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Finding the Fourth Proportional to 121,490.82, 167,652.45 and 70,500.87

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Solution

The fourth proportional to 121,490.82, 167,652.45 and 70,500.87 is: 97,288.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,490.82 : 167,652.45 = 70,500.87 : x
  2. Step 2: Convert to fraction form
    121,490.82/167,652.45 = 70,500.87/x
  3. Step 3: Cross multiply
    121,490.82x = 167,652.45 × 70,500.87
  4. Step 4: Simplify right side
    121,490.82x = 11,819,643,582.63
  5. Step 5: Solve for x
    x = 11,819,643,582.63/121,490.82
  6. Step 6: Final answer
    x = 97,288.37

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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.