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Finding the Fourth Proportional to 158,304.96, 218,460.78 and 86,689.32

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Solution

The fourth proportional to 158,304.96, 218,460.78 and 86,689.32 is: 119,631.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,304.96 : 218,460.78 = 86,689.32 : x
  2. Step 2: Convert to fraction form
    158,304.96/218,460.78 = 86,689.32/x
  3. Step 3: Cross multiply
    158,304.96x = 218,460.78 × 86,689.32
  4. Step 4: Simplify right side
    158,304.96x = 18,938,216,464.87
  5. Step 5: Solve for x
    x = 18,938,216,464.87/158,304.96
  6. Step 6: Final answer
    x = 119,631.23

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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.