Home / 78,711.86-108,624.08-42,903.65

Finding the Fourth Proportional to 78,711.86, 108,624.08 and 42,903.65

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Solution

The fourth proportional to 78,711.86, 108,624.08 and 42,903.65 is: 59,207.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,711.86 : 108,624.08 = 42,903.65 : x
  2. Step 2: Convert to fraction form
    78,711.86/108,624.08 = 42,903.65/x
  3. Step 3: Cross multiply
    78,711.86x = 108,624.08 × 42,903.65
  4. Step 4: Simplify right side
    78,711.86x = 4,660,369,074.03
  5. Step 5: Solve for x
    x = 4,660,369,074.03/78,711.86
  6. Step 6: Final answer
    x = 59,207.97

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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.