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Finding the Fourth Proportional to 158,156.10, 218,255.15 and 86,536.40

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Solution

The fourth proportional to 158,156.10, 218,255.15 and 86,536.40 is: 119,420.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,156.10 : 218,255.15 = 86,536.40 : x
  2. Step 2: Convert to fraction form
    158,156.10/218,255.15 = 86,536.40/x
  3. Step 3: Cross multiply
    158,156.10x = 218,255.15 × 86,536.40
  4. Step 4: Simplify right side
    158,156.10x = 18,887,013,438.50
  5. Step 5: Solve for x
    x = 18,887,013,438.50/158,156.10
  6. Step 6: Final answer
    x = 119,420.08

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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.