Home / 120,987.60-181,438.20-42,104.40

Finding the Fourth Proportional to 120,987.60, 181,438.20 and 42,104.40

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Solution

The fourth proportional to 120,987.60, 181,438.20 and 42,104.40 is: 63,141.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,987.60 : 181,438.20 = 42,104.40 : x
  2. Step 2: Convert to fraction form
    120,987.60/181,438.20 = 42,104.40/x
  3. Step 3: Cross multiply
    120,987.60x = 181,438.20 × 42,104.40
  4. Step 4: Simplify right side
    120,987.60x = 7,639,346,548.08
  5. Step 5: Solve for x
    x = 7,639,346,548.08/120,987.60
  6. Step 6: Final answer
    x = 63,141.57

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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.