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Finding the Fourth Proportional to 86,231.52, 129,347.28 and 36,309.60

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Solution

The fourth proportional to 86,231.52, 129,347.28 and 36,309.60 is: 54,464.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,231.52 : 129,347.28 = 36,309.60 : x
  2. Step 2: Convert to fraction form
    86,231.52/129,347.28 = 36,309.60/x
  3. Step 3: Cross multiply
    86,231.52x = 129,347.28 × 36,309.60
  4. Step 4: Simplify right side
    86,231.52x = 4,696,547,997.89
  5. Step 5: Solve for x
    x = 4,696,547,997.89/86,231.52
  6. Step 6: Final answer
    x = 54,464.40

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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.