Home / 137,129.12-189,235.68-77,513.12

Finding the Fourth Proportional to 137,129.12, 189,235.68 and 77,513.12

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Solution

The fourth proportional to 137,129.12, 189,235.68 and 77,513.12 is: 106,966.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,129.12 : 189,235.68 = 77,513.12 : x
  2. Step 2: Convert to fraction form
    137,129.12/189,235.68 = 77,513.12/x
  3. Step 3: Cross multiply
    137,129.12x = 189,235.68 × 77,513.12
  4. Step 4: Simplify right side
    137,129.12x = 14,668,247,972.12
  5. Step 5: Solve for x
    x = 14,668,247,972.12/137,129.12
  6. Step 6: Final answer
    x = 106,966.69

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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.