Home / 138,067.50-190,534.28-77,637.62

Finding the Fourth Proportional to 138,067.50, 190,534.28 and 77,637.62

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Solution

The fourth proportional to 138,067.50, 190,534.28 and 77,637.62 is: 107,140.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,067.50 : 190,534.28 = 77,637.62 : x
  2. Step 2: Convert to fraction form
    138,067.50/190,534.28 = 77,637.62/x
  3. Step 3: Cross multiply
    138,067.50x = 190,534.28 × 77,637.62
  4. Step 4: Simplify right side
    138,067.50x = 14,792,626,686.75
  5. Step 5: Solve for x
    x = 14,792,626,686.75/138,067.50
  6. Step 6: Final answer
    x = 107,140.54

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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.