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Finding the Fourth Proportional to 138,365.01, 190,955.48 and 77,947.52

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Solution

The fourth proportional to 138,365.01, 190,955.48 and 77,947.52 is: 107,574.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,365.01 : 190,955.48 = 77,947.52 : x
  2. Step 2: Convert to fraction form
    138,365.01/190,955.48 = 77,947.52/x
  3. Step 3: Cross multiply
    138,365.01x = 190,955.48 × 77,947.52
  4. Step 4: Simplify right side
    138,365.01x = 14,884,504,751.89
  5. Step 5: Solve for x
    x = 14,884,504,751.89/138,365.01
  6. Step 6: Final answer
    x = 107,574.20

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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.