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Finding the Fourth Proportional to 215,687,071.80, 323,530,607.70 and 100,683,239.40

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Solution

The fourth proportional to 215,687,071.80, 323,530,607.70 and 100,683,239.40 is: 151,024,859.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,687,071.80 : 323,530,607.70 = 100,683,239.40 : x
  2. Step 2: Convert to fraction form
    215,687,071.80/323,530,607.70 = 100,683,239.40/x
  3. Step 3: Cross multiply
    215,687,071.80x = 323,530,607.70 × 100,683,239.40
  4. Step 4: Simplify right side
    215,687,071.80x = 32,574,109,628,286,584
  5. Step 5: Solve for x
    x = 32,574,109,628,286,584/215,687,071.80
  6. Step 6: Final answer
    x = 151,024,859.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.