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Finding the Fourth Proportional to 123,482.88, 170,390.08 and 78,080.76

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Solution

The fourth proportional to 123,482.88, 170,390.08 and 78,080.76 is: 107,741.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,482.88 : 170,390.08 = 78,080.76 : x
  2. Step 2: Convert to fraction form
    123,482.88/170,390.08 = 78,080.76/x
  3. Step 3: Cross multiply
    123,482.88x = 170,390.08 × 78,080.76
  4. Step 4: Simplify right side
    123,482.88x = 13,304,187,040.46
  5. Step 5: Solve for x
    x = 13,304,187,040.46/123,482.88
  6. Step 6: Final answer
    x = 107,741.15

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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.