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Finding the Fourth Proportional to 117,963.53, 162,897.86 and 74,957.20

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Solution

The fourth proportional to 117,963.53, 162,897.86 and 74,957.20 is: 103,509.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,963.53 : 162,897.86 = 74,957.20 : x
  2. Step 2: Convert to fraction form
    117,963.53/162,897.86 = 74,957.20/x
  3. Step 3: Cross multiply
    117,963.53x = 162,897.86 × 74,957.20
  4. Step 4: Simplify right side
    117,963.53x = 12,210,367,471.59
  5. Step 5: Solve for x
    x = 12,210,367,471.59/117,963.53
  6. Step 6: Final answer
    x = 103,509.68

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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.