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Finding the Fourth Proportional to 138,633.08, 191,365.48 and 107,945.48

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Solution

The fourth proportional to 138,633.08, 191,365.48 and 107,945.48 is: 149,005.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,633.08 : 191,365.48 = 107,945.48 : x
  2. Step 2: Convert to fraction form
    138,633.08/191,365.48 = 107,945.48/x
  3. Step 3: Cross multiply
    138,633.08x = 191,365.48 × 107,945.48
  4. Step 4: Simplify right side
    138,633.08x = 20,657,038,594.03
  5. Step 5: Solve for x
    x = 20,657,038,594.03/138,633.08
  6. Step 6: Final answer
    x = 149,005.12

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1.5x scale

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.