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Finding the Fourth Proportional to 187,218.60, 280,827.90 and 81,925.80

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Solution

The fourth proportional to 187,218.60, 280,827.90 and 81,925.80 is: 122,888.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,218.60 : 280,827.90 = 81,925.80 : x
  2. Step 2: Convert to fraction form
    187,218.60/280,827.90 = 81,925.80/x
  3. Step 3: Cross multiply
    187,218.60x = 280,827.90 × 81,925.80
  4. Step 4: Simplify right side
    187,218.60x = 23,007,050,369.82
  5. Step 5: Solve for x
    x = 23,007,050,369.82/187,218.60
  6. Step 6: Final answer
    x = 122,888.70

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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.