Home / 105,691.32-145,836.09-69,862.19

Finding the Fourth Proportional to 105,691.32, 145,836.09 and 69,862.19

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Solution

The fourth proportional to 105,691.32, 145,836.09 and 69,862.19 is: 96,397.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,691.32 : 145,836.09 = 69,862.19 : x
  2. Step 2: Convert to fraction form
    105,691.32/145,836.09 = 69,862.19/x
  3. Step 3: Cross multiply
    105,691.32x = 145,836.09 × 69,862.19
  4. Step 4: Simplify right side
    105,691.32x = 10,188,427,899.26
  5. Step 5: Solve for x
    x = 10,188,427,899.26/105,691.32
  6. Step 6: Final answer
    x = 96,397.96

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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.