Home / 135,502.18-187,019.16-78,178.52

Finding the Fourth Proportional to 135,502.18, 187,019.16 and 78,178.52

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Solution

The fourth proportional to 135,502.18, 187,019.16 and 78,178.52 is: 107,901.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,502.18 : 187,019.16 = 78,178.52 : x
  2. Step 2: Convert to fraction form
    135,502.18/187,019.16 = 78,178.52/x
  3. Step 3: Cross multiply
    135,502.18x = 187,019.16 × 78,178.52
  4. Step 4: Simplify right side
    135,502.18x = 14,620,881,140.44
  5. Step 5: Solve for x
    x = 14,620,881,140.44/135,502.18
  6. Step 6: Final answer
    x = 107,901.45

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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.