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Finding the Fourth Proportional to 98,762.79, 136,291.67 and 53,439.78

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Solution

The fourth proportional to 98,762.79, 136,291.67 and 53,439.78 is: 73,746.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,762.79 : 136,291.67 = 53,439.78 : x
  2. Step 2: Convert to fraction form
    98,762.79/136,291.67 = 53,439.78/x
  3. Step 3: Cross multiply
    98,762.79x = 136,291.67 × 53,439.78
  4. Step 4: Simplify right side
    98,762.79x = 7,283,396,593.43
  5. Step 5: Solve for x
    x = 7,283,396,593.43/98,762.79
  6. Step 6: Final answer
    x = 73,746.36

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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.