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Finding the Fourth Proportional to 98,666.80, 148,019.40 and 42,506.80

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Solution

The fourth proportional to 98,666.80, 148,019.40 and 42,506.80 is: 63,768.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,666.80 : 148,019.40 = 42,506.80 : x
  2. Step 2: Convert to fraction form
    98,666.80/148,019.40 = 42,506.80/x
  3. Step 3: Cross multiply
    98,666.80x = 148,019.40 × 42,506.80
  4. Step 4: Simplify right side
    98,666.80x = 6,291,831,031.92
  5. Step 5: Solve for x
    x = 6,291,831,031.92/98,666.80
  6. Step 6: Final answer
    x = 63,768.47

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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.