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Finding the Fourth Proportional to 110,988.97, 153,166.34 and 65,665.82

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Solution

The fourth proportional to 110,988.97, 153,166.34 and 65,665.82 is: 90,619.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,988.97 : 153,166.34 = 65,665.82 : x
  2. Step 2: Convert to fraction form
    110,988.97/153,166.34 = 65,665.82/x
  3. Step 3: Cross multiply
    110,988.97x = 153,166.34 × 65,665.82
  4. Step 4: Simplify right side
    110,988.97x = 10,057,793,312.50
  5. Step 5: Solve for x
    x = 10,057,793,312.50/110,988.97
  6. Step 6: Final answer
    x = 90,619.76

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1.5x scale

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.