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Finding the Fourth Proportional to 120,368.20, 180,581.10 and 57,987.40

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Solution

The fourth proportional to 120,368.20, 180,581.10 and 57,987.40 is: 86,994.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,368.20 : 180,581.10 = 57,987.40 : x
  2. Step 2: Convert to fraction form
    120,368.20/180,581.10 = 57,987.40/x
  3. Step 3: Cross multiply
    120,368.20x = 180,581.10 × 57,987.40
  4. Step 4: Simplify right side
    120,368.20x = 10,471,428,478.14
  5. Step 5: Solve for x
    x = 10,471,428,478.14/120,368.20
  6. Step 6: Final answer
    x = 86,994.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.