Home / 100,045.60-138,074.84-57,612.40

Finding the Fourth Proportional to 100,045.60, 138,074.84 and 57,612.40

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Solution

The fourth proportional to 100,045.60, 138,074.84 and 57,612.40 is: 79,511.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,045.60 : 138,074.84 = 57,612.40 : x
  2. Step 2: Convert to fraction form
    100,045.60/138,074.84 = 57,612.40/x
  3. Step 3: Cross multiply
    100,045.60x = 138,074.84 × 57,612.40
  4. Step 4: Simplify right side
    100,045.60x = 7,954,822,912.02
  5. Step 5: Solve for x
    x = 7,954,822,912.02/100,045.60
  6. Step 6: Final answer
    x = 79,511.97

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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.