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Finding the Fourth Proportional to 100,302.74, 138,419.34 and 60,018.20

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Solution

The fourth proportional to 100,302.74, 138,419.34 and 60,018.20 is: 82,826.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,302.74 : 138,419.34 = 60,018.20 : x
  2. Step 2: Convert to fraction form
    100,302.74/138,419.34 = 60,018.20/x
  3. Step 3: Cross multiply
    100,302.74x = 138,419.34 × 60,018.20
  4. Step 4: Simplify right side
    100,302.74x = 8,307,679,631.99
  5. Step 5: Solve for x
    x = 8,307,679,631.99/100,302.74
  6. Step 6: Final answer
    x = 82,826.05

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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.