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Finding the Fourth Proportional to 98,987.69, 136,622.87 and 58,723.81

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Solution

The fourth proportional to 98,987.69, 136,622.87 and 58,723.81 is: 81,050.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,987.69 : 136,622.87 = 58,723.81 : x
  2. Step 2: Convert to fraction form
    98,987.69/136,622.87 = 58,723.81/x
  3. Step 3: Cross multiply
    98,987.69x = 136,622.87 × 58,723.81
  4. Step 4: Simplify right side
    98,987.69x = 8,023,015,044.57
  5. Step 5: Solve for x
    x = 8,023,015,044.57/98,987.69
  6. Step 6: Final answer
    x = 81,050.63

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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.