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Finding the Fourth Proportional to 118,635.64, 163,894.96 and 77,896.40

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Solution

The fourth proportional to 118,635.64, 163,894.96 and 77,896.40 is: 107,613.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,635.64 : 163,894.96 = 77,896.40 : x
  2. Step 2: Convert to fraction form
    118,635.64/163,894.96 = 77,896.40/x
  3. Step 3: Cross multiply
    118,635.64x = 163,894.96 × 77,896.40
  4. Step 4: Simplify right side
    118,635.64x = 12,766,827,362.14
  5. Step 5: Solve for x
    x = 12,766,827,362.14/118,635.64
  6. Step 6: Final answer
    x = 107,613.76

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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.