Home / 81,132.32-112,070.64-65,276.57

Finding the Fourth Proportional to 81,132.32, 112,070.64 and 65,276.57

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Solution

The fourth proportional to 81,132.32, 112,070.64 and 65,276.57 is: 90,168.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,132.32 : 112,070.64 = 65,276.57 : x
  2. Step 2: Convert to fraction form
    81,132.32/112,070.64 = 65,276.57/x
  3. Step 3: Cross multiply
    81,132.32x = 112,070.64 × 65,276.57
  4. Step 4: Simplify right side
    81,132.32x = 7,315,586,416.55
  5. Step 5: Solve for x
    x = 7,315,586,416.55/81,132.32
  6. Step 6: Final answer
    x = 90,168.59

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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.