Home / 90,470.01-135,490.50-71,689.66

Finding the Fourth Proportional to 90,470.01, 135,490.50 and 71,689.66

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Solution

The fourth proportional to 90,470.01, 135,490.50 and 71,689.66 is: 107,364.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,470.01 : 135,490.50 = 71,689.66 : x
  2. Step 2: Convert to fraction form
    90,470.01/135,490.50 = 71,689.66/x
  3. Step 3: Cross multiply
    90,470.01x = 135,490.50 × 71,689.66
  4. Step 4: Simplify right side
    90,470.01x = 9,713,267,878.23
  5. Step 5: Solve for x
    x = 9,713,267,878.23/90,470.01
  6. Step 6: Final answer
    x = 107,364.51

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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.