Home / 137,589.15-189,792.37-86,520.87

Finding the Fourth Proportional to 137,589.15, 189,792.37 and 86,520.87

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Solution

The fourth proportional to 137,589.15, 189,792.37 and 86,520.87 is: 119,348.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,589.15 : 189,792.37 = 86,520.87 : x
  2. Step 2: Convert to fraction form
    137,589.15/189,792.37 = 86,520.87/x
  3. Step 3: Cross multiply
    137,589.15x = 189,792.37 × 86,520.87
  4. Step 4: Simplify right side
    137,589.15x = 16,421,000,971.76
  5. Step 5: Solve for x
    x = 16,421,000,971.76/137,589.15
  6. Step 6: Final answer
    x = 119,348.08

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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.