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Finding the Fourth Proportional to 158,416.60, 218,614.98 and 86,799.40

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Solution

The fourth proportional to 158,416.60, 218,614.98 and 86,799.40 is: 119,783.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,416.60 : 218,614.98 = 86,799.40 : x
  2. Step 2: Convert to fraction form
    158,416.60/218,614.98 = 86,799.40/x
  3. Step 3: Cross multiply
    158,416.60x = 218,614.98 × 86,799.40
  4. Step 4: Simplify right side
    158,416.60x = 18,975,649,095.01
  5. Step 5: Solve for x
    x = 18,975,649,095.01/158,416.60
  6. Step 6: Final answer
    x = 119,783.21

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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.