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Finding the Fourth Proportional to 112,512.30, 168,768.45 and 86,268.30

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Solution

The fourth proportional to 112,512.30, 168,768.45 and 86,268.30 is: 129,402.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,512.30 : 168,768.45 = 86,268.30 : x
  2. Step 2: Convert to fraction form
    112,512.30/168,768.45 = 86,268.30/x
  3. Step 3: Cross multiply
    112,512.30x = 168,768.45 × 86,268.30
  4. Step 4: Simplify right side
    112,512.30x = 14,559,367,275.14
  5. Step 5: Solve for x
    x = 14,559,367,275.14/112,512.30
  6. Step 6: Final answer
    x = 129,402.45

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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.