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Finding the Fourth Proportional to 121,447.78, 167,598.72 and 70,490.98

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Solution

The fourth proportional to 121,447.78, 167,598.72 and 70,490.98 is: 97,278.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,447.78 : 167,598.72 = 70,490.98 : x
  2. Step 2: Convert to fraction form
    121,447.78/167,598.72 = 70,490.98/x
  3. Step 3: Cross multiply
    121,447.78x = 167,598.72 × 70,490.98
  4. Step 4: Simplify right side
    121,447.78x = 11,814,198,019.55
  5. Step 5: Solve for x
    x = 11,814,198,019.55/121,447.78
  6. Step 6: Final answer
    x = 97,278.01

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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.