Home / 138,298.74-190,850.15-77,869.20

Finding the Fourth Proportional to 138,298.74, 190,850.15 and 77,869.20

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Solution

The fourth proportional to 138,298.74, 190,850.15 and 77,869.20 is: 107,458.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,298.74 : 190,850.15 = 77,869.20 : x
  2. Step 2: Convert to fraction form
    138,298.74/190,850.15 = 77,869.20/x
  3. Step 3: Cross multiply
    138,298.74x = 190,850.15 × 77,869.20
  4. Step 4: Simplify right side
    138,298.74x = 14,861,348,118.20
  5. Step 5: Solve for x
    x = 14,861,348,118.20/138,298.74
  6. Step 6: Final answer
    x = 107,458.30

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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.