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Finding the Fourth Proportional to 131,657.72, 181,660.80 and 77,915.84

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Solution

The fourth proportional to 131,657.72, 181,660.80 and 77,915.84 is: 107,507.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,657.72 : 181,660.80 = 77,915.84 : x
  2. Step 2: Convert to fraction form
    131,657.72/181,660.80 = 77,915.84/x
  3. Step 3: Cross multiply
    131,657.72x = 181,660.80 × 77,915.84
  4. Step 4: Simplify right side
    131,657.72x = 14,154,253,827.07
  5. Step 5: Solve for x
    x = 14,154,253,827.07/131,657.72
  6. Step 6: Final answer
    x = 107,507.97

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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.