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Finding the Fourth Proportional to 118,158.72, 163,076.40 and 70,440

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Solution

The fourth proportional to 118,158.72, 163,076.40 and 70,440 is: 97,217.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,158.72 : 163,076.40 = 70,440 : x
  2. Step 2: Convert to fraction form
    118,158.72/163,076.40 = 70,440/x
  3. Step 3: Cross multiply
    118,158.72x = 163,076.40 × 70,440
  4. Step 4: Simplify right side
    118,158.72x = 11,487,101,616
  5. Step 5: Solve for x
    x = 11,487,101,616/118,158.72
  6. Step 6: Final answer
    x = 97,217.55

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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.