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Finding the Fourth Proportional to 65,037.99, 89,766.90 and 39,538.95

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Solution

The fourth proportional to 65,037.99, 89,766.90 and 39,538.95 is: 54,572.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,037.99 : 89,766.90 = 39,538.95 : x
  2. Step 2: Convert to fraction form
    65,037.99/89,766.90 = 39,538.95/x
  3. Step 3: Cross multiply
    65,037.99x = 89,766.90 × 39,538.95
  4. Step 4: Simplify right side
    65,037.99x = 3,549,288,970.76
  5. Step 5: Solve for x
    x = 3,549,288,970.76/65,037.99
  6. Step 6: Final answer
    x = 54,572.55

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1.5x scale

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.