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Finding the Fourth Proportional to 99,602.20, 149,403.30 and 87,938.20

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Solution

The fourth proportional to 99,602.20, 149,403.30 and 87,938.20 is: 131,907.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,602.20 : 149,403.30 = 87,938.20 : x
  2. Step 2: Convert to fraction form
    99,602.20/149,403.30 = 87,938.20/x
  3. Step 3: Cross multiply
    99,602.20x = 149,403.30 × 87,938.20
  4. Step 4: Simplify right side
    99,602.20x = 13,138,257,276.06
  5. Step 5: Solve for x
    x = 13,138,257,276.06/99,602.20
  6. Step 6: Final answer
    x = 131,907.30

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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.