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Finding the Fourth Proportional to 86,541.16, 129,698.62 and 44,385.64

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Solution

The fourth proportional to 86,541.16, 129,698.62 and 44,385.64 is: 66,520.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,541.16 : 129,698.62 = 44,385.64 : x
  2. Step 2: Convert to fraction form
    86,541.16/129,698.62 = 44,385.64/x
  3. Step 3: Cross multiply
    86,541.16x = 129,698.62 × 44,385.64
  4. Step 4: Simplify right side
    86,541.16x = 5,756,756,255.82
  5. Step 5: Solve for x
    x = 5,756,756,255.82/86,541.16
  6. Step 6: Final answer
    x = 66,520.44

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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.