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Finding the Fourth Proportional to 121,060.80, 167,001.12 and 70,730.64

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Solution

The fourth proportional to 121,060.80, 167,001.12 and 70,730.64 is: 97,571.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,060.80 : 167,001.12 = 70,730.64 : x
  2. Step 2: Convert to fraction form
    121,060.80/167,001.12 = 70,730.64/x
  3. Step 3: Cross multiply
    121,060.80x = 167,001.12 × 70,730.64
  4. Step 4: Simplify right side
    121,060.80x = 11,812,096,098.32
  5. Step 5: Solve for x
    x = 11,812,096,098.32/121,060.80
  6. Step 6: Final answer
    x = 97,571.60

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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.