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Finding the Fourth Proportional to 128,877.40, 193,364.70 and 62,376.40

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Solution

The fourth proportional to 128,877.40, 193,364.70 and 62,376.40 is: 93,588.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,877.40 : 193,364.70 = 62,376.40 : x
  2. Step 2: Convert to fraction form
    128,877.40/193,364.70 = 62,376.40/x
  3. Step 3: Cross multiply
    128,877.40x = 193,364.70 × 62,376.40
  4. Step 4: Simplify right side
    128,877.40x = 12,061,393,873.08
  5. Step 5: Solve for x
    x = 12,061,393,873.08/128,877.40
  6. Step 6: Final answer
    x = 93,588.12

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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.