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Finding the Fourth Proportional to 72,479.71, 99,929.41 and 46,940.95

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Solution

The fourth proportional to 72,479.71, 99,929.41 and 46,940.95 is: 64,718.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,479.71 : 99,929.41 = 46,940.95 : x
  2. Step 2: Convert to fraction form
    72,479.71/99,929.41 = 46,940.95/x
  3. Step 3: Cross multiply
    72,479.71x = 99,929.41 × 46,940.95
  4. Step 4: Simplify right side
    72,479.71x = 4,690,781,438.34
  5. Step 5: Solve for x
    x = 4,690,781,438.34/72,479.71
  6. Step 6: Final answer
    x = 64,718.55

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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.