Home / 156,729.36-216,290.24-85,112.40

Finding the Fourth Proportional to 156,729.36, 216,290.24 and 85,112.40

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Solution

The fourth proportional to 156,729.36, 216,290.24 and 85,112.40 is: 117,457.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,729.36 : 216,290.24 = 85,112.40 : x
  2. Step 2: Convert to fraction form
    156,729.36/216,290.24 = 85,112.40/x
  3. Step 3: Cross multiply
    156,729.36x = 216,290.24 × 85,112.40
  4. Step 4: Simplify right side
    156,729.36x = 18,408,981,422.98
  5. Step 5: Solve for x
    x = 18,408,981,422.98/156,729.36
  6. Step 6: Final answer
    x = 117,457.13

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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.