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Finding the Fourth Proportional to 157,681.81, 217,601.67 and 86,063.50

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Solution

The fourth proportional to 157,681.81, 217,601.67 and 86,063.50 is: 118,768.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,681.81 : 217,601.67 = 86,063.50 : x
  2. Step 2: Convert to fraction form
    157,681.81/217,601.67 = 86,063.50/x
  3. Step 3: Cross multiply
    157,681.81x = 217,601.67 × 86,063.50
  4. Step 4: Simplify right side
    157,681.81x = 18,727,561,326.05
  5. Step 5: Solve for x
    x = 18,727,561,326.05/157,681.81
  6. Step 6: Final answer
    x = 118,768.05

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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.