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Finding the Fourth Proportional to 108,062.76, 148,948.10 and 72,239.70

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Solution

The fourth proportional to 108,062.76, 148,948.10 and 72,239.70 is: 99,571.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,062.76 : 148,948.10 = 72,239.70 : x
  2. Step 2: Convert to fraction form
    108,062.76/148,948.10 = 72,239.70/x
  3. Step 3: Cross multiply
    108,062.76x = 148,948.10 × 72,239.70
  4. Step 4: Simplify right side
    108,062.76x = 10,759,966,059.57
  5. Step 5: Solve for x
    x = 10,759,966,059.57/108,062.76
  6. Step 6: Final answer
    x = 99,571.45

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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.