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Finding the Fourth Proportional to 158,293.90, 218,445.60 and 86,678.32

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Solution

The fourth proportional to 158,293.90, 218,445.60 and 86,678.32 is: 119,616.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,293.90 : 218,445.60 = 86,678.32 : x
  2. Step 2: Convert to fraction form
    158,293.90/218,445.60 = 86,678.32/x
  3. Step 3: Cross multiply
    158,293.90x = 218,445.60 × 86,678.32
  4. Step 4: Simplify right side
    158,293.90x = 18,934,497,619.39
  5. Step 5: Solve for x
    x = 18,934,497,619.39/158,293.90
  6. Step 6: Final answer
    x = 119,616.09

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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.