Home / 100,229.21-138,312.70-57,210.92

Finding the Fourth Proportional to 100,229.21, 138,312.70 and 57,210.92

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Solution

The fourth proportional to 100,229.21, 138,312.70 and 57,210.92 is: 78,949.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,229.21 : 138,312.70 = 57,210.92 : x
  2. Step 2: Convert to fraction form
    100,229.21/138,312.70 = 57,210.92/x
  3. Step 3: Cross multiply
    100,229.21x = 138,312.70 × 57,210.92
  4. Step 4: Simplify right side
    100,229.21x = 7,912,996,498.77
  5. Step 5: Solve for x
    x = 7,912,996,498.77/100,229.21
  6. Step 6: Final answer
    x = 78,949.01

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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.