Home / 91,215.20-136,531.20-64,971.20

Finding the Fourth Proportional to 91,215.20, 136,531.20 and 64,971.20

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Solution

The fourth proportional to 91,215.20, 136,531.20 and 64,971.20 is: 97,249.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,215.20 : 136,531.20 = 64,971.20 : x
  2. Step 2: Convert to fraction form
    91,215.20/136,531.20 = 64,971.20/x
  3. Step 3: Cross multiply
    91,215.20x = 136,531.20 × 64,971.20
  4. Step 4: Simplify right side
    91,215.20x = 8,870,595,901.44
  5. Step 5: Solve for x
    x = 8,870,595,901.44/91,215.20
  6. Step 6: Final answer
    x = 97,249.10

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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.