Home / 151,391.21-208,909.85-90,925.92

Finding the Fourth Proportional to 151,391.21, 208,909.85 and 90,925.92

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Solution

The fourth proportional to 151,391.21, 208,909.85 and 90,925.92 is: 125,471.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,391.21 : 208,909.85 = 90,925.92 : x
  2. Step 2: Convert to fraction form
    151,391.21/208,909.85 = 90,925.92/x
  3. Step 3: Cross multiply
    151,391.21x = 208,909.85 × 90,925.92
  4. Step 4: Simplify right side
    151,391.21x = 18,995,319,853.68
  5. Step 5: Solve for x
    x = 18,995,319,853.68/151,391.21
  6. Step 6: Final answer
    x = 125,471.75

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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.