Home / 138,279.61-190,811.26-77,849.16

Finding the Fourth Proportional to 138,279.61, 190,811.26 and 77,849.16

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Solution

The fourth proportional to 138,279.61, 190,811.26 and 77,849.16 is: 107,423.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,279.61 : 190,811.26 = 77,849.16 : x
  2. Step 2: Convert to fraction form
    138,279.61/190,811.26 = 77,849.16/x
  3. Step 3: Cross multiply
    138,279.61x = 190,811.26 × 77,849.16
  4. Step 4: Simplify right side
    138,279.61x = 14,854,494,966.24
  5. Step 5: Solve for x
    x = 14,854,494,966.24/138,279.61
  6. Step 6: Final answer
    x = 107,423.61

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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.