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Finding the Fourth Proportional to 108,641.76, 162,907.08 and 45,444.78

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Solution

The fourth proportional to 108,641.76, 162,907.08 and 45,444.78 is: 68,143.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,641.76 : 162,907.08 = 45,444.78 : x
  2. Step 2: Convert to fraction form
    108,641.76/162,907.08 = 45,444.78/x
  3. Step 3: Cross multiply
    108,641.76x = 162,907.08 × 45,444.78
  4. Step 4: Simplify right side
    108,641.76x = 7,403,276,411.04
  5. Step 5: Solve for x
    x = 7,403,276,411.04/108,641.76
  6. Step 6: Final answer
    x = 68,143.93

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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.