Home / 90,319.30-135,429.60-71,718.82

Finding the Fourth Proportional to 90,319.30, 135,429.60 and 71,718.82

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Solution

The fourth proportional to 90,319.30, 135,429.60 and 71,718.82 is: 107,539.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,319.30 : 135,429.60 = 71,718.82 : x
  2. Step 2: Convert to fraction form
    90,319.30/135,429.60 = 71,718.82/x
  3. Step 3: Cross multiply
    90,319.30x = 135,429.60 × 71,718.82
  4. Step 4: Simplify right side
    90,319.30x = 9,712,851,105.07
  5. Step 5: Solve for x
    x = 9,712,851,105.07/90,319.30
  6. Step 6: Final answer
    x = 107,539.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.