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Finding the Fourth Proportional to 158,590.02, 218,854.53 and 86,970.57

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Solution

The fourth proportional to 158,590.02, 218,854.53 and 86,970.57 is: 120,019.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,590.02 : 218,854.53 = 86,970.57 : x
  2. Step 2: Convert to fraction form
    158,590.02/218,854.53 = 86,970.57/x
  3. Step 3: Cross multiply
    158,590.02x = 218,854.53 × 86,970.57
  4. Step 4: Simplify right side
    158,590.02x = 19,033,903,221.18
  5. Step 5: Solve for x
    x = 19,033,903,221.18/158,590.02
  6. Step 6: Final answer
    x = 120,019.55

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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.