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Finding the Fourth Proportional to 72,811.40, 109,217.10 and 62,313.80

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Solution

The fourth proportional to 72,811.40, 109,217.10 and 62,313.80 is: 93,470.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,811.40 : 109,217.10 = 62,313.80 : x
  2. Step 2: Convert to fraction form
    72,811.40/109,217.10 = 62,313.80/x
  3. Step 3: Cross multiply
    72,811.40x = 109,217.10 × 62,313.80
  4. Step 4: Simplify right side
    72,811.40x = 6,805,732,525.98
  5. Step 5: Solve for x
    x = 6,805,732,525.98/72,811.40
  6. Step 6: Final answer
    x = 93,470.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.