Home / 105,279.92-157,988.64-38,720.72

Finding the Fourth Proportional to 105,279.92, 157,988.64 and 38,720.72

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Solution

The fourth proportional to 105,279.92, 157,988.64 and 38,720.72 is: 58,106.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,279.92 : 157,988.64 = 38,720.72 : x
  2. Step 2: Convert to fraction form
    105,279.92/157,988.64 = 38,720.72/x
  3. Step 3: Cross multiply
    105,279.92x = 157,988.64 × 38,720.72
  4. Step 4: Simplify right side
    105,279.92x = 6,117,433,892.62
  5. Step 5: Solve for x
    x = 6,117,433,892.62/105,279.92
  6. Step 6: Final answer
    x = 58,106.37

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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.