Home / 136,943.28-188,971.02-76,510.80

Finding the Fourth Proportional to 136,943.28, 188,971.02 and 76,510.80

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Solution

The fourth proportional to 136,943.28, 188,971.02 and 76,510.80 is: 105,578.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,943.28 : 188,971.02 = 76,510.80 : x
  2. Step 2: Convert to fraction form
    136,943.28/188,971.02 = 76,510.80/x
  3. Step 3: Cross multiply
    136,943.28x = 188,971.02 × 76,510.80
  4. Step 4: Simplify right side
    136,943.28x = 14,458,323,917.02
  5. Step 5: Solve for x
    x = 14,458,323,917.02/136,943.28
  6. Step 6: Final answer
    x = 105,578.92

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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.