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Finding the Fourth Proportional to 71,280, 98,253.08 and 56,148.72

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Solution

The fourth proportional to 71,280, 98,253.08 and 56,148.72 is: 77,395.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,280 : 98,253.08 = 56,148.72 : x
  2. Step 2: Convert to fraction form
    71,280/98,253.08 = 56,148.72/x
  3. Step 3: Cross multiply
    71,280x = 98,253.08 × 56,148.72
  4. Step 4: Simplify right side
    71,280x = 5,516,784,678.06
  5. Step 5: Solve for x
    x = 5,516,784,678.06/71,280
  6. Step 6: Final answer
    x = 77,395.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.