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Finding the Fourth Proportional to 98,800.40, 148,200.60 and 28,686.80

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Solution

The fourth proportional to 98,800.40, 148,200.60 and 28,686.80 is: 43,030.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,800.40 : 148,200.60 = 28,686.80 : x
  2. Step 2: Convert to fraction form
    98,800.40/148,200.60 = 28,686.80/x
  3. Step 3: Cross multiply
    98,800.40x = 148,200.60 × 28,686.80
  4. Step 4: Simplify right side
    98,800.40x = 4,251,400,972.08
  5. Step 5: Solve for x
    x = 4,251,400,972.08/98,800.40
  6. Step 6: Final answer
    x = 43,030.20

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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.