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Finding the Fourth Proportional to 86,468.28, 129,589.32 and 44,312.64

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Solution

The fourth proportional to 86,468.28, 129,589.32 and 44,312.64 is: 66,411.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,468.28 : 129,589.32 = 44,312.64 : x
  2. Step 2: Convert to fraction form
    86,468.28/129,589.32 = 44,312.64/x
  3. Step 3: Cross multiply
    86,468.28x = 129,589.32 × 44,312.64
  4. Step 4: Simplify right side
    86,468.28x = 5,742,444,885.00
  5. Step 5: Solve for x
    x = 5,742,444,885.00/86,468.28
  6. Step 6: Final answer
    x = 66,411.00

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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.