Home / 90,965.77-135,737.19-81,509.58

Finding the Fourth Proportional to 90,965.77, 135,737.19 and 81,509.58

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Solution

The fourth proportional to 90,965.77, 135,737.19 and 81,509.58 is: 121,626.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,965.77 : 135,737.19 = 81,509.58 : x
  2. Step 2: Convert to fraction form
    90,965.77/135,737.19 = 81,509.58/x
  3. Step 3: Cross multiply
    90,965.77x = 135,737.19 × 81,509.58
  4. Step 4: Simplify right side
    90,965.77x = 11,063,881,347.28
  5. Step 5: Solve for x
    x = 11,063,881,347.28/90,965.77
  6. Step 6: Final answer
    x = 121,626.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.