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Finding the Fourth Proportional to 118,358.78, 163,334.24 and 64,643.82

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Solution

The fourth proportional to 118,358.78, 163,334.24 and 64,643.82 is: 89,207.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,358.78 : 163,334.24 = 64,643.82 : x
  2. Step 2: Convert to fraction form
    118,358.78/163,334.24 = 64,643.82/x
  3. Step 3: Cross multiply
    118,358.78x = 163,334.24 × 64,643.82
  4. Step 4: Simplify right side
    118,358.78x = 10,558,549,210.40
  5. Step 5: Solve for x
    x = 10,558,549,210.40/118,358.78
  6. Step 6: Final answer
    x = 89,207.99

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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.