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Finding the Fourth Proportional to 78,366.72, 117,549.88 and 28,446.80

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Solution

The fourth proportional to 78,366.72, 117,549.88 and 28,446.80 is: 42,670.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,366.72 : 117,549.88 = 28,446.80 : x
  2. Step 2: Convert to fraction form
    78,366.72/117,549.88 = 28,446.80/x
  3. Step 3: Cross multiply
    78,366.72x = 117,549.88 × 28,446.80
  4. Step 4: Simplify right side
    78,366.72x = 3,343,917,926.38
  5. Step 5: Solve for x
    x = 3,343,917,926.38/78,366.72
  6. Step 6: Final answer
    x = 42,670.13

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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.