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Finding the Fourth Proportional to 124,472.99, 171,746.95 and 72,780.14

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Solution

The fourth proportional to 124,472.99, 171,746.95 and 72,780.14 is: 100,421.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,472.99 : 171,746.95 = 72,780.14 : x
  2. Step 2: Convert to fraction form
    124,472.99/171,746.95 = 72,780.14/x
  3. Step 3: Cross multiply
    124,472.99x = 171,746.95 × 72,780.14
  4. Step 4: Simplify right side
    124,472.99x = 12,499,767,065.57
  5. Step 5: Solve for x
    x = 12,499,767,065.57/124,472.99
  6. Step 6: Final answer
    x = 100,421.52

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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.