Home / 100,785.06-139,036.84-64,986.57

Finding the Fourth Proportional to 100,785.06, 139,036.84 and 64,986.57

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Solution

The fourth proportional to 100,785.06, 139,036.84 and 64,986.57 is: 89,651.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,785.06 : 139,036.84 = 64,986.57 : x
  2. Step 2: Convert to fraction form
    100,785.06/139,036.84 = 64,986.57/x
  3. Step 3: Cross multiply
    100,785.06x = 139,036.84 × 64,986.57
  4. Step 4: Simplify right side
    100,785.06x = 9,035,527,335.24
  5. Step 5: Solve for x
    x = 9,035,527,335.24/100,785.06
  6. Step 6: Final answer
    x = 89,651.46

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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.