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Finding the Fourth Proportional to 121,009.48, 166,986.60 and 70,023.08

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Solution

The fourth proportional to 121,009.48, 166,986.60 and 70,023.08 is: 96,628.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,009.48 : 166,986.60 = 70,023.08 : x
  2. Step 2: Convert to fraction form
    121,009.48/166,986.60 = 70,023.08/x
  3. Step 3: Cross multiply
    121,009.48x = 166,986.60 × 70,023.08
  4. Step 4: Simplify right side
    121,009.48x = 11,692,916,205.61
  5. Step 5: Solve for x
    x = 11,692,916,205.61/121,009.48
  6. Step 6: Final answer
    x = 96,628.10

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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.