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Finding the Fourth Proportional to 72,488.50, 100,034.40 and 42,294.67

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Solution

The fourth proportional to 72,488.50, 100,034.40 and 42,294.67 is: 58,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,488.50 : 100,034.40 = 42,294.67 : x
  2. Step 2: Convert to fraction form
    72,488.50/100,034.40 = 42,294.67/x
  3. Step 3: Cross multiply
    72,488.50x = 100,034.40 × 42,294.67
  4. Step 4: Simplify right side
    72,488.50x = 4,230,921,936.65
  5. Step 5: Solve for x
    x = 4,230,921,936.65/72,488.50
  6. Step 6: Final answer
    x = 58,366.80

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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.