Home / 154,418.10-213,079.05-86,438.76

Finding the Fourth Proportional to 154,418.10, 213,079.05 and 86,438.76

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Solution

The fourth proportional to 154,418.10, 213,079.05 and 86,438.76 is: 119,275.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,418.10 : 213,079.05 = 86,438.76 : x
  2. Step 2: Convert to fraction form
    154,418.10/213,079.05 = 86,438.76/x
  3. Step 3: Cross multiply
    154,418.10x = 213,079.05 × 86,438.76
  4. Step 4: Simplify right side
    154,418.10x = 18,418,288,863.98
  5. Step 5: Solve for x
    x = 18,418,288,863.98/154,418.10
  6. Step 6: Final answer
    x = 119,275.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.