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Finding the Fourth Proportional to 108,917.60, 163,386.48 and 42,362.78

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Solution

The fourth proportional to 108,917.60, 163,386.48 and 42,362.78 is: 63,548.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,917.60 : 163,386.48 = 42,362.78 : x
  2. Step 2: Convert to fraction form
    108,917.60/163,386.48 = 42,362.78/x
  3. Step 3: Cross multiply
    108,917.60x = 163,386.48 × 42,362.78
  4. Step 4: Simplify right side
    108,917.60x = 6,921,506,074.54
  5. Step 5: Solve for x
    x = 6,921,506,074.54/108,917.60
  6. Step 6: Final answer
    x = 63,548.09

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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.