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Finding the Fourth Proportional to 72,575.50, 100,136.66 and 42,343.56

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Solution

The fourth proportional to 72,575.50, 100,136.66 and 42,343.56 is: 58,423.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,575.50 : 100,136.66 = 42,343.56 : x
  2. Step 2: Convert to fraction form
    72,575.50/100,136.66 = 42,343.56/x
  3. Step 3: Cross multiply
    72,575.50x = 100,136.66 × 42,343.56
  4. Step 4: Simplify right side
    72,575.50x = 4,240,142,670.91
  5. Step 5: Solve for x
    x = 4,240,142,670.91/72,575.50
  6. Step 6: Final answer
    x = 58,423.89

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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.