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Finding the Fourth Proportional to 115,007.70, 172,519.65 and 65,111.70

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Solution

The fourth proportional to 115,007.70, 172,519.65 and 65,111.70 is: 97,672.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,007.70 : 172,519.65 = 65,111.70 : x
  2. Step 2: Convert to fraction form
    115,007.70/172,519.65 = 65,111.70/x
  3. Step 3: Cross multiply
    115,007.70x = 172,519.65 × 65,111.70
  4. Step 4: Simplify right side
    115,007.70x = 11,233,047,694.91
  5. Step 5: Solve for x
    x = 11,233,047,694.91/115,007.70
  6. Step 6: Final answer
    x = 97,672.14

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1.5x scale

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.