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Finding the Fourth Proportional to 120,969.60, 181,411.20 and 42,086.40

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Solution

The fourth proportional to 120,969.60, 181,411.20 and 42,086.40 is: 63,114.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,969.60 : 181,411.20 = 42,086.40 : x
  2. Step 2: Convert to fraction form
    120,969.60/181,411.20 = 42,086.40/x
  3. Step 3: Cross multiply
    120,969.60x = 181,411.20 × 42,086.40
  4. Step 4: Simplify right side
    120,969.60x = 7,634,944,327.68
  5. Step 5: Solve for x
    x = 7,634,944,327.68/120,969.60
  6. Step 6: Final answer
    x = 63,114.57

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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.