Home / 156,729.19-216,287.07-85,109.20

Finding the Fourth Proportional to 156,729.19, 216,287.07 and 85,109.20

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Solution

The fourth proportional to 156,729.19, 216,287.07 and 85,109.20 is: 117,451.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,729.19 : 216,287.07 = 85,109.20 : x
  2. Step 2: Convert to fraction form
    156,729.19/216,287.07 = 85,109.20/x
  3. Step 3: Cross multiply
    156,729.19x = 216,287.07 × 85,109.20
  4. Step 4: Simplify right side
    156,729.19x = 18,408,019,498.04
  5. Step 5: Solve for x
    x = 18,408,019,498.04/156,729.19
  6. Step 6: Final answer
    x = 117,451.12

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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.