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Finding the Fourth Proportional to 153,985.75, 212,500.34 and 83,329.75

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Solution

The fourth proportional to 153,985.75, 212,500.34 and 83,329.75 is: 114,995.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,985.75 : 212,500.34 = 83,329.75 : x
  2. Step 2: Convert to fraction form
    153,985.75/212,500.34 = 83,329.75/x
  3. Step 3: Cross multiply
    153,985.75x = 212,500.34 × 83,329.75
  4. Step 4: Simplify right side
    153,985.75x = 17,707,600,207.12
  5. Step 5: Solve for x
    x = 17,707,600,207.12/153,985.75
  6. Step 6: Final answer
    x = 114,995.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.