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Finding the Fourth Proportional to 118,140.95, 163,031.55 and 64,427

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Solution

The fourth proportional to 118,140.95, 163,031.55 and 64,427 is: 88,907.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,140.95 : 163,031.55 = 64,427 : x
  2. Step 2: Convert to fraction form
    118,140.95/163,031.55 = 64,427/x
  3. Step 3: Cross multiply
    118,140.95x = 163,031.55 × 64,427
  4. Step 4: Simplify right side
    118,140.95x = 10,503,633,671.85
  5. Step 5: Solve for x
    x = 10,503,633,671.85/118,140.95
  6. Step 6: Final answer
    x = 88,907.65

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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.