Home / 147,788.40-221,682.60-85,426.80

Finding the Fourth Proportional to 147,788.40, 221,682.60 and 85,426.80

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Solution

The fourth proportional to 147,788.40, 221,682.60 and 85,426.80 is: 128,140.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,788.40 : 221,682.60 = 85,426.80 : x
  2. Step 2: Convert to fraction form
    147,788.40/221,682.60 = 85,426.80/x
  3. Step 3: Cross multiply
    147,788.40x = 221,682.60 × 85,426.80
  4. Step 4: Simplify right side
    147,788.40x = 18,937,635,133.68
  5. Step 5: Solve for x
    x = 18,937,635,133.68/147,788.40
  6. Step 6: Final answer
    x = 128,140.20

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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.