Home / 135,693.65-187,227.27-78,320.76

Finding the Fourth Proportional to 135,693.65, 187,227.27 and 78,320.76

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Solution

The fourth proportional to 135,693.65, 187,227.27 and 78,320.76 is: 108,065.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,693.65 : 187,227.27 = 78,320.76 : x
  2. Step 2: Convert to fraction form
    135,693.65/187,227.27 = 78,320.76/x
  3. Step 3: Cross multiply
    135,693.65x = 187,227.27 × 78,320.76
  4. Step 4: Simplify right side
    135,693.65x = 14,663,782,079.13
  5. Step 5: Solve for x
    x = 14,663,782,079.13/135,693.65
  6. Step 6: Final answer
    x = 108,065.35

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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.