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Finding the Fourth Proportional to 91,808.20, 137,712.30 and 63,668.80

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Solution

The fourth proportional to 91,808.20, 137,712.30 and 63,668.80 is: 95,503.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,808.20 : 137,712.30 = 63,668.80 : x
  2. Step 2: Convert to fraction form
    91,808.20/137,712.30 = 63,668.80/x
  3. Step 3: Cross multiply
    91,808.20x = 137,712.30 × 63,668.80
  4. Step 4: Simplify right side
    91,808.20x = 8,767,976,886.24
  5. Step 5: Solve for x
    x = 8,767,976,886.24/91,808.20
  6. Step 6: Final answer
    x = 95,503.20

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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.