Home / 100,156.42-138,216.18-54,834.76

Finding the Fourth Proportional to 100,156.42, 138,216.18 and 54,834.76

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Solution

The fourth proportional to 100,156.42, 138,216.18 and 54,834.76 is: 75,672.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,156.42 : 138,216.18 = 54,834.76 : x
  2. Step 2: Convert to fraction form
    100,156.42/138,216.18 = 54,834.76/x
  3. Step 3: Cross multiply
    100,156.42x = 138,216.18 × 54,834.76
  4. Step 4: Simplify right side
    100,156.42x = 7,579,051,058.42
  5. Step 5: Solve for x
    x = 7,579,051,058.42/100,156.42
  6. Step 6: Final answer
    x = 75,672.14

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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.