Home / 142,001.20-212,742.60-86,532.40

Finding the Fourth Proportional to 142,001.20, 212,742.60 and 86,532.40

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Solution

The fourth proportional to 142,001.20, 212,742.60 and 86,532.40 is: 129,640.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,001.20 : 212,742.60 = 86,532.40 : x
  2. Step 2: Convert to fraction form
    142,001.20/212,742.60 = 86,532.40/x
  3. Step 3: Cross multiply
    142,001.20x = 212,742.60 × 86,532.40
  4. Step 4: Simplify right side
    142,001.20x = 18,409,127,760.24
  5. Step 5: Solve for x
    x = 18,409,127,760.24/142,001.20
  6. Step 6: Final answer
    x = 129,640.65

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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.