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Finding the Fourth Proportional to 74,721.30, 111,751.47 and 66,459.30

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Solution

The fourth proportional to 74,721.30, 111,751.47 and 66,459.30 is: 99,395.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,721.30 : 111,751.47 = 66,459.30 : x
  2. Step 2: Convert to fraction form
    74,721.30/111,751.47 = 66,459.30/x
  3. Step 3: Cross multiply
    74,721.30x = 111,751.47 × 66,459.30
  4. Step 4: Simplify right side
    74,721.30x = 7,426,924,470.17
  5. Step 5: Solve for x
    x = 7,426,924,470.17/74,721.30
  6. Step 6: Final answer
    x = 99,395.01

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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.