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Finding the Fourth Proportional to 118,643.64, 177,981.12 and 43,816.38

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Solution

The fourth proportional to 118,643.64, 177,981.12 and 43,816.38 is: 65,730.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,643.64 : 177,981.12 = 43,816.38 : x
  2. Step 2: Convert to fraction form
    118,643.64/177,981.12 = 43,816.38/x
  3. Step 3: Cross multiply
    118,643.64x = 177,981.12 × 43,816.38
  4. Step 4: Simplify right side
    118,643.64x = 7,798,488,386.75
  5. Step 5: Solve for x
    x = 7,798,488,386.75/118,643.64
  6. Step 6: Final answer
    x = 65,730.35

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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.