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Finding the Fourth Proportional to 157,758.90, 217,699.16 and 86,125.10

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Solution

The fourth proportional to 157,758.90, 217,699.16 and 86,125.10 is: 118,848.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,758.90 : 217,699.16 = 86,125.10 : x
  2. Step 2: Convert to fraction form
    157,758.90/217,699.16 = 86,125.10/x
  3. Step 3: Cross multiply
    157,758.90x = 217,699.16 × 86,125.10
  4. Step 4: Simplify right side
    157,758.90x = 18,749,360,405.79
  5. Step 5: Solve for x
    x = 18,749,360,405.79/157,758.90
  6. Step 6: Final answer
    x = 118,848.19

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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.