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Finding the Fourth Proportional to 118,433.71, 163,431.63 and 64,719.17

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Solution

The fourth proportional to 118,433.71, 163,431.63 and 64,719.17 is: 89,308.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,433.71 : 163,431.63 = 64,719.17 : x
  2. Step 2: Convert to fraction form
    118,433.71/163,431.63 = 64,719.17/x
  3. Step 3: Cross multiply
    118,433.71x = 163,431.63 × 64,719.17
  4. Step 4: Simplify right side
    118,433.71x = 10,577,158,628.19
  5. Step 5: Solve for x
    x = 10,577,158,628.19/118,433.71
  6. Step 6: Final answer
    x = 89,308.68

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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.