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Finding the Fourth Proportional to 158,802.11, 219,147.28 and 87,186.74

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Solution

The fourth proportional to 158,802.11, 219,147.28 and 87,186.74 is: 120,317.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,802.11 : 219,147.28 = 87,186.74 : x
  2. Step 2: Convert to fraction form
    158,802.11/219,147.28 = 87,186.74/x
  3. Step 3: Cross multiply
    158,802.11x = 219,147.28 × 87,186.74
  4. Step 4: Simplify right side
    158,802.11x = 19,106,736,923.07
  5. Step 5: Solve for x
    x = 19,106,736,923.07/158,802.11
  6. Step 6: Final answer
    x = 120,317.90

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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.