Home / 121,430.35-182,145.53-86,000.95

Finding the Fourth Proportional to 121,430.35, 182,145.53 and 86,000.95

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Solution

The fourth proportional to 121,430.35, 182,145.53 and 86,000.95 is: 129,001.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,430.35 : 182,145.53 = 86,000.95 : x
  2. Step 2: Convert to fraction form
    121,430.35/182,145.53 = 86,000.95/x
  3. Step 3: Cross multiply
    121,430.35x = 182,145.53 × 86,000.95
  4. Step 4: Simplify right side
    121,430.35x = 15,664,688,188.25
  5. Step 5: Solve for x
    x = 15,664,688,188.25/121,430.35
  6. Step 6: Final answer
    x = 129,001.43

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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.