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Finding the Fourth Proportional to 115,445.80, 173,168.70 and 99,699.40

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Solution

The fourth proportional to 115,445.80, 173,168.70 and 99,699.40 is: 149,549.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,445.80 : 173,168.70 = 99,699.40 : x
  2. Step 2: Convert to fraction form
    115,445.80/173,168.70 = 99,699.40/x
  3. Step 3: Cross multiply
    115,445.80x = 173,168.70 × 99,699.40
  4. Step 4: Simplify right side
    115,445.80x = 17,264,815,488.78
  5. Step 5: Solve for x
    x = 17,264,815,488.78/115,445.80
  6. Step 6: Final answer
    x = 149,549.10

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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.