Home / 87,211.40-130,817.10-21,547.40

Finding the Fourth Proportional to 87,211.40, 130,817.10 and 21,547.40

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Solution

The fourth proportional to 87,211.40, 130,817.10 and 21,547.40 is: 32,321.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,211.40 : 130,817.10 = 21,547.40 : x
  2. Step 2: Convert to fraction form
    87,211.40/130,817.10 = 21,547.40/x
  3. Step 3: Cross multiply
    87,211.40x = 130,817.10 × 21,547.40
  4. Step 4: Simplify right side
    87,211.40x = 2,818,768,380.54
  5. Step 5: Solve for x
    x = 2,818,768,380.54/87,211.40
  6. Step 6: Final answer
    x = 32,321.10

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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.