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Finding the Fourth Proportional to 72,478.71, 99,928.03 and 46,939.95

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Solution

The fourth proportional to 72,478.71, 99,928.03 and 46,939.95 is: 64,717.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,478.71 : 99,928.03 = 46,939.95 : x
  2. Step 2: Convert to fraction form
    72,478.71/99,928.03 = 46,939.95/x
  3. Step 3: Cross multiply
    72,478.71x = 99,928.03 × 46,939.95
  4. Step 4: Simplify right side
    72,478.71x = 4,690,616,731.80
  5. Step 5: Solve for x
    x = 4,690,616,731.80/72,478.71
  6. Step 6: Final answer
    x = 64,717.17

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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.