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Finding the Fourth Proportional to 158,590.77, 218,855.57 and 86,971.32

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Solution

The fourth proportional to 158,590.77, 218,855.57 and 86,971.32 is: 120,020.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,590.77 : 218,855.57 = 86,971.32 : x
  2. Step 2: Convert to fraction form
    158,590.77/218,855.57 = 86,971.32/x
  3. Step 3: Cross multiply
    158,590.77x = 218,855.57 × 86,971.32
  4. Step 4: Simplify right side
    158,590.77x = 19,034,157,377.40
  5. Step 5: Solve for x
    x = 19,034,157,377.40/158,590.77
  6. Step 6: Final answer
    x = 120,020.59

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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.