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Finding the Fourth Proportional to 158,560.86, 218,812.32 and 86,940.72

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Solution

The fourth proportional to 158,560.86, 218,812.32 and 86,940.72 is: 119,977.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,560.86 : 218,812.32 = 86,940.72 : x
  2. Step 2: Convert to fraction form
    158,560.86/218,812.32 = 86,940.72/x
  3. Step 3: Cross multiply
    158,560.86x = 218,812.32 × 86,940.72
  4. Step 4: Simplify right side
    158,560.86x = 19,023,700,645.67
  5. Step 5: Solve for x
    x = 19,023,700,645.67/158,560.86
  6. Step 6: Final answer
    x = 119,977.28

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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.