Home / 112,430.60-155,160.20-64,691.20

Finding the Fourth Proportional to 112,430.60, 155,160.20 and 64,691.20

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Solution

The fourth proportional to 112,430.60, 155,160.20 and 64,691.20 is: 89,277.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,430.60 : 155,160.20 = 64,691.20 : x
  2. Step 2: Convert to fraction form
    112,430.60/155,160.20 = 64,691.20/x
  3. Step 3: Cross multiply
    112,430.60x = 155,160.20 × 64,691.20
  4. Step 4: Simplify right side
    112,430.60x = 10,037,499,530.24
  5. Step 5: Solve for x
    x = 10,037,499,530.24/112,430.60
  6. Step 6: Final answer
    x = 89,277.29

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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.