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Finding the Fourth Proportional to 157,877.40, 217,873.95 and 86,261.86

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Solution

The fourth proportional to 157,877.40, 217,873.95 and 86,261.86 is: 119,043.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,877.40 : 217,873.95 = 86,261.86 : x
  2. Step 2: Convert to fraction form
    157,877.40/217,873.95 = 86,261.86/x
  3. Step 3: Cross multiply
    157,877.40x = 217,873.95 × 86,261.86
  4. Step 4: Simplify right side
    157,877.40x = 18,794,212,606.63
  5. Step 5: Solve for x
    x = 18,794,212,606.63/157,877.40
  6. Step 6: Final answer
    x = 119,043.08

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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.