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Finding the Fourth Proportional to 91,423.72, 126,113.96 and 53,178.96

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Solution

The fourth proportional to 91,423.72, 126,113.96 and 53,178.96 is: 73,357.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,423.72 : 126,113.96 = 53,178.96 : x
  2. Step 2: Convert to fraction form
    91,423.72/126,113.96 = 53,178.96/x
  3. Step 3: Cross multiply
    91,423.72x = 126,113.96 × 53,178.96
  4. Step 4: Simplify right side
    91,423.72x = 6,706,609,840.16
  5. Step 5: Solve for x
    x = 6,706,609,840.16/91,423.72
  6. Step 6: Final answer
    x = 73,357.44

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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.