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Finding the Fourth Proportional to 118,697.88, 163,798.14 and 64,981.56

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Solution

The fourth proportional to 118,697.88, 163,798.14 and 64,981.56 is: 89,671.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,697.88 : 163,798.14 = 64,981.56 : x
  2. Step 2: Convert to fraction form
    118,697.88/163,798.14 = 64,981.56/x
  3. Step 3: Cross multiply
    118,697.88x = 163,798.14 × 64,981.56
  4. Step 4: Simplify right side
    118,697.88x = 10,643,858,662.30
  5. Step 5: Solve for x
    x = 10,643,858,662.30/118,697.88
  6. Step 6: Final answer
    x = 89,671.85

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1.5x scale

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.