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Finding the Fourth Proportional to 86,543.36, 129,925.76 and 73,478.74

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Solution

The fourth proportional to 86,543.36, 129,925.76 and 73,478.74 is: 110,312.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,543.36 : 129,925.76 = 73,478.74 : x
  2. Step 2: Convert to fraction form
    86,543.36/129,925.76 = 73,478.74/x
  3. Step 3: Cross multiply
    86,543.36x = 129,925.76 × 73,478.74
  4. Step 4: Simplify right side
    86,543.36x = 9,546,781,138.34
  5. Step 5: Solve for x
    x = 9,546,781,138.34/86,543.36
  6. Step 6: Final answer
    x = 110,312.12

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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.