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Finding the Fourth Proportional to 86,543.90, 129,815.85 and 56,995.10

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Solution

The fourth proportional to 86,543.90, 129,815.85 and 56,995.10 is: 85,492.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,543.90 : 129,815.85 = 56,995.10 : x
  2. Step 2: Convert to fraction form
    86,543.90/129,815.85 = 56,995.10/x
  3. Step 3: Cross multiply
    86,543.90x = 129,815.85 × 56,995.10
  4. Step 4: Simplify right side
    86,543.90x = 7,398,867,352.34
  5. Step 5: Solve for x
    x = 7,398,867,352.34/86,543.90
  6. Step 6: Final answer
    x = 85,492.65

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Similar ratio
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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.