Home / 138,436.32-191,125.10-90,772.80

Finding the Fourth Proportional to 138,436.32, 191,125.10 and 90,772.80

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Solution

The fourth proportional to 138,436.32, 191,125.10 and 90,772.80 is: 125,320.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,436.32 : 191,125.10 = 90,772.80 : x
  2. Step 2: Convert to fraction form
    138,436.32/191,125.10 = 90,772.80/x
  3. Step 3: Cross multiply
    138,436.32x = 191,125.10 × 90,772.80
  4. Step 4: Simplify right side
    138,436.32x = 17,348,960,477.28
  5. Step 5: Solve for x
    x = 17,348,960,477.28/138,436.32
  6. Step 6: Final answer
    x = 125,320.87

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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.