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Finding the Fourth Proportional to 108,775.61, 163,282.61 and 86,429.93

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Solution

The fourth proportional to 108,775.61, 163,282.61 and 86,429.93 is: 129,739.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,775.61 : 163,282.61 = 86,429.93 : x
  2. Step 2: Convert to fraction form
    108,775.61/163,282.61 = 86,429.93/x
  3. Step 3: Cross multiply
    108,775.61x = 163,282.61 × 86,429.93
  4. Step 4: Simplify right side
    108,775.61x = 14,112,504,552.52
  5. Step 5: Solve for x
    x = 14,112,504,552.52/108,775.61
  6. Step 6: Final answer
    x = 129,739.60

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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.