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Finding the Fourth Proportional to 98,129.36, 147,195.32 and 42,723.28

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Solution

The fourth proportional to 98,129.36, 147,195.32 and 42,723.28 is: 64,085.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,129.36 : 147,195.32 = 42,723.28 : x
  2. Step 2: Convert to fraction form
    98,129.36/147,195.32 = 42,723.28/x
  3. Step 3: Cross multiply
    98,129.36x = 147,195.32 × 42,723.28
  4. Step 4: Simplify right side
    98,129.36x = 6,288,666,871.05
  5. Step 5: Solve for x
    x = 6,288,666,871.05/98,129.36
  6. Step 6: Final answer
    x = 64,085.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.