Home / 121,621.40-182,432.10-77,298.20

Finding the Fourth Proportional to 121,621.40, 182,432.10 and 77,298.20

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Solution

The fourth proportional to 121,621.40, 182,432.10 and 77,298.20 is: 115,947.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,621.40 : 182,432.10 = 77,298.20 : x
  2. Step 2: Convert to fraction form
    121,621.40/182,432.10 = 77,298.20/x
  3. Step 3: Cross multiply
    121,621.40x = 182,432.10 × 77,298.20
  4. Step 4: Simplify right side
    121,621.40x = 14,101,672,952.22
  5. Step 5: Solve for x
    x = 14,101,672,952.22/121,621.40
  6. Step 6: Final answer
    x = 115,947.30

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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.