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Finding the Fourth Proportional to 123,316.74, 170,177.13 and 66,728.34

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Solution

The fourth proportional to 123,316.74, 170,177.13 and 66,728.34 is: 92,085.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,316.74 : 170,177.13 = 66,728.34 : x
  2. Step 2: Convert to fraction form
    123,316.74/170,177.13 = 66,728.34/x
  3. Step 3: Cross multiply
    123,316.74x = 170,177.13 × 66,728.34
  4. Step 4: Simplify right side
    123,316.74x = 11,355,637,390.86
  5. Step 5: Solve for x
    x = 11,355,637,390.86/123,316.74
  6. Step 6: Final answer
    x = 92,085.12

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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.