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Finding the Fourth Proportional to 90,541.76, 124,689.28 and 65,351.36

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Solution

The fourth proportional to 90,541.76, 124,689.28 and 65,351.36 is: 89,998.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,541.76 : 124,689.28 = 65,351.36 : x
  2. Step 2: Convert to fraction form
    90,541.76/124,689.28 = 65,351.36/x
  3. Step 3: Cross multiply
    90,541.76x = 124,689.28 × 65,351.36
  4. Step 4: Simplify right side
    90,541.76x = 8,148,614,025.42
  5. Step 5: Solve for x
    x = 8,148,614,025.42/90,541.76
  6. Step 6: Final answer
    x = 89,998.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.