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Finding the Fourth Proportional to 123,681.72, 170,680.80 and 69,965.64

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Solution

The fourth proportional to 123,681.72, 170,680.80 and 69,965.64 is: 96,552.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,681.72 : 170,680.80 = 69,965.64 : x
  2. Step 2: Convert to fraction form
    123,681.72/170,680.80 = 69,965.64/x
  3. Step 3: Cross multiply
    123,681.72x = 170,680.80 × 69,965.64
  4. Step 4: Simplify right side
    123,681.72x = 11,941,791,407.71
  5. Step 5: Solve for x
    x = 11,941,791,407.71/123,681.72
  6. Step 6: Final answer
    x = 96,552.60

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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.