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Finding the Fourth Proportional to 157,645.65, 217,555.62 and 86,030.30

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Solution

The fourth proportional to 157,645.65, 217,555.62 and 86,030.30 is: 118,724.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,645.65 : 217,555.62 = 86,030.30 : x
  2. Step 2: Convert to fraction form
    157,645.65/217,555.62 = 86,030.30/x
  3. Step 3: Cross multiply
    157,645.65x = 217,555.62 × 86,030.30
  4. Step 4: Simplify right side
    157,645.65x = 18,716,374,167.51
  5. Step 5: Solve for x
    x = 18,716,374,167.51/157,645.65
  6. Step 6: Final answer
    x = 118,724.33

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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.