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Finding the Fourth Proportional to 157,645.90, 217,555.96 and 86,030.54

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Solution

The fourth proportional to 157,645.90, 217,555.96 and 86,030.54 is: 118,724.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,645.90 : 217,555.96 = 86,030.54 : x
  2. Step 2: Convert to fraction form
    157,645.90/217,555.96 = 86,030.54/x
  3. Step 3: Cross multiply
    157,645.90x = 217,555.96 × 86,030.54
  4. Step 4: Simplify right side
    157,645.90x = 18,716,456,719.02
  5. Step 5: Solve for x
    x = 18,716,456,719.02/157,645.90
  6. Step 6: Final answer
    x = 118,724.67

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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.