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Finding the Fourth Proportional to 158,130.09, 218,234.54 and 86,520.87

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Solution

The fourth proportional to 158,130.09, 218,234.54 and 86,520.87 is: 119,407.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,130.09 : 218,234.54 = 86,520.87 : x
  2. Step 2: Convert to fraction form
    158,130.09/218,234.54 = 86,520.87/x
  3. Step 3: Cross multiply
    158,130.09x = 218,234.54 × 86,520.87
  4. Step 4: Simplify right side
    158,130.09x = 18,881,842,481.15
  5. Step 5: Solve for x
    x = 18,881,842,481.15/158,130.09
  6. Step 6: Final answer
    x = 119,407.02

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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.