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Finding the Fourth Proportional to 98,799.64, 148,199.30 and 28,678.95

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Solution

The fourth proportional to 98,799.64, 148,199.30 and 28,678.95 is: 43,018.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,799.64 : 148,199.30 = 28,678.95 : x
  2. Step 2: Convert to fraction form
    98,799.64/148,199.30 = 28,678.95/x
  3. Step 3: Cross multiply
    98,799.64x = 148,199.30 × 28,678.95
  4. Step 4: Simplify right side
    98,799.64x = 4,250,200,314.74
  5. Step 5: Solve for x
    x = 4,250,200,314.74/98,799.64
  6. Step 6: Final answer
    x = 43,018.38

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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.