Home / 138,981.86-191,795.13-75,319.65

Finding the Fourth Proportional to 138,981.86, 191,795.13 and 75,319.65

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Solution

The fourth proportional to 138,981.86, 191,795.13 and 75,319.65 is: 103,941.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,981.86 : 191,795.13 = 75,319.65 : x
  2. Step 2: Convert to fraction form
    138,981.86/191,795.13 = 75,319.65/x
  3. Step 3: Cross multiply
    138,981.86x = 191,795.13 × 75,319.65
  4. Step 4: Simplify right side
    138,981.86x = 14,445,942,063.30
  5. Step 5: Solve for x
    x = 14,445,942,063.30/138,981.86
  6. Step 6: Final answer
    x = 103,941.21

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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.