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Finding the Fourth Proportional to 98,965.37, 136,590.50 and 56,523.90

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Solution

The fourth proportional to 98,965.37, 136,590.50 and 56,523.90 is: 78,013.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,965.37 : 136,590.50 = 56,523.90 : x
  2. Step 2: Convert to fraction form
    98,965.37/136,590.50 = 56,523.90/x
  3. Step 3: Cross multiply
    98,965.37x = 136,590.50 × 56,523.90
  4. Step 4: Simplify right side
    98,965.37x = 7,720,627,480.33
  5. Step 5: Solve for x
    x = 7,720,627,480.33/98,965.37
  6. Step 6: Final answer
    x = 78,013.43

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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.