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Finding the Fourth Proportional to 157,967.31, 217,994.86 and 86,347.62

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Solution

The fourth proportional to 157,967.31, 217,994.86 and 86,347.62 is: 119,159.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,967.31 : 217,994.86 = 86,347.62 : x
  2. Step 2: Convert to fraction form
    157,967.31/217,994.86 = 86,347.62/x
  3. Step 3: Cross multiply
    157,967.31x = 217,994.86 × 86,347.62
  4. Step 4: Simplify right side
    157,967.31x = 18,823,337,441.17
  5. Step 5: Solve for x
    x = 18,823,337,441.17/157,967.31
  6. Step 6: Final answer
    x = 119,159.70

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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.