Home / 138,149.16-190,634.91-77,707.77

Finding the Fourth Proportional to 138,149.16, 190,634.91 and 77,707.77

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Solution

The fourth proportional to 138,149.16, 190,634.91 and 77,707.77 is: 107,230.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,149.16 : 190,634.91 = 77,707.77 : x
  2. Step 2: Convert to fraction form
    138,149.16/190,634.91 = 77,707.77/x
  3. Step 3: Cross multiply
    138,149.16x = 190,634.91 × 77,707.77
  4. Step 4: Simplify right side
    138,149.16x = 14,813,813,740.25
  5. Step 5: Solve for x
    x = 14,813,813,740.25/138,149.16
  6. Step 6: Final answer
    x = 107,230.57

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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.