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Finding the Fourth Proportional to 243,036.80, 364,555.20 and 85,208.30

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Solution

The fourth proportional to 243,036.80, 364,555.20 and 85,208.30 is: 127,812.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,036.80 : 364,555.20 = 85,208.30 : x
  2. Step 2: Convert to fraction form
    243,036.80/364,555.20 = 85,208.30/x
  3. Step 3: Cross multiply
    243,036.80x = 364,555.20 × 85,208.30
  4. Step 4: Simplify right side
    243,036.80x = 31,063,128,848.16
  5. Step 5: Solve for x
    x = 31,063,128,848.16/243,036.80
  6. Step 6: Final answer
    x = 127,812.45

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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.