Home / 145,904.40-218,856.60-121,021.20

Finding the Fourth Proportional to 145,904.40, 218,856.60 and 121,021.20

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Solution

The fourth proportional to 145,904.40, 218,856.60 and 121,021.20 is: 181,531.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,904.40 : 218,856.60 = 121,021.20 : x
  2. Step 2: Convert to fraction form
    145,904.40/218,856.60 = 121,021.20/x
  3. Step 3: Cross multiply
    145,904.40x = 218,856.60 × 121,021.20
  4. Step 4: Simplify right side
    145,904.40x = 26,486,288,359.92
  5. Step 5: Solve for x
    x = 26,486,288,359.92/145,904.40
  6. Step 6: Final answer
    x = 181,531.80

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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.