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Finding the Fourth Proportional to 91,125.80, 136,688.70 and 55,951.40

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Solution

The fourth proportional to 91,125.80, 136,688.70 and 55,951.40 is: 83,927.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,125.80 : 136,688.70 = 55,951.40 : x
  2. Step 2: Convert to fraction form
    91,125.80/136,688.70 = 55,951.40/x
  3. Step 3: Cross multiply
    91,125.80x = 136,688.70 × 55,951.40
  4. Step 4: Simplify right side
    91,125.80x = 7,647,924,129.18
  5. Step 5: Solve for x
    x = 7,647,924,129.18/91,125.80
  6. Step 6: Final answer
    x = 83,927.10

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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.