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Finding the Fourth Proportional to 147,128.80, 220,808.40 and 68,252.80

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Solution

The fourth proportional to 147,128.80, 220,808.40 and 68,252.80 is: 102,432.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,128.80 : 220,808.40 = 68,252.80 : x
  2. Step 2: Convert to fraction form
    147,128.80/220,808.40 = 68,252.80/x
  3. Step 3: Cross multiply
    147,128.80x = 220,808.40 × 68,252.80
  4. Step 4: Simplify right side
    147,128.80x = 15,070,791,563.52
  5. Step 5: Solve for x
    x = 15,070,791,563.52/147,128.80
  6. Step 6: Final answer
    x = 102,432.64

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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.