Home / 137,411.40-205,657.83-78,231.18

Finding the Fourth Proportional to 137,411.40, 205,657.83 and 78,231.18

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Solution

The fourth proportional to 137,411.40, 205,657.83 and 78,231.18 is: 117,085.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,411.40 : 205,657.83 = 78,231.18 : x
  2. Step 2: Convert to fraction form
    137,411.40/205,657.83 = 78,231.18/x
  3. Step 3: Cross multiply
    137,411.40x = 205,657.83 × 78,231.18
  4. Step 4: Simplify right side
    137,411.40x = 16,088,854,717.14
  5. Step 5: Solve for x
    x = 16,088,854,717.14/137,411.40
  6. Step 6: Final answer
    x = 117,085.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.