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Finding the Fourth Proportional to 126,279, 174,267.45 and 69,689.16

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Solution

The fourth proportional to 126,279, 174,267.45 and 69,689.16 is: 96,172.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,279 : 174,267.45 = 69,689.16 : x
  2. Step 2: Convert to fraction form
    126,279/174,267.45 = 69,689.16/x
  3. Step 3: Cross multiply
    126,279x = 174,267.45 × 69,689.16
  4. Step 4: Simplify right side
    126,279x = 12,144,552,205.84
  5. Step 5: Solve for x
    x = 12,144,552,205.84/126,279
  6. Step 6: Final answer
    x = 96,172.38

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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.