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Finding the Fourth Proportional to 102,392.88, 141,225.84 and 90,921.66

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Solution

The fourth proportional to 102,392.88, 141,225.84 and 90,921.66 is: 125,404.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,392.88 : 141,225.84 = 90,921.66 : x
  2. Step 2: Convert to fraction form
    102,392.88/141,225.84 = 90,921.66/x
  3. Step 3: Cross multiply
    102,392.88x = 141,225.84 × 90,921.66
  4. Step 4: Simplify right side
    102,392.88x = 12,840,487,807.69
  5. Step 5: Solve for x
    x = 12,840,487,807.69/102,392.88
  6. Step 6: Final answer
    x = 125,404.11

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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.