Home / 90,652.32-135,931.78-40,689.58

Finding the Fourth Proportional to 90,652.32, 135,931.78 and 40,689.58

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Solution

The fourth proportional to 90,652.32, 135,931.78 and 40,689.58 is: 61,013.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,652.32 : 135,931.78 = 40,689.58 : x
  2. Step 2: Convert to fraction form
    90,652.32/135,931.78 = 40,689.58/x
  3. Step 3: Cross multiply
    90,652.32x = 135,931.78 × 40,689.58
  4. Step 4: Simplify right side
    90,652.32x = 5,531,007,036.85
  5. Step 5: Solve for x
    x = 5,531,007,036.85/90,652.32
  6. Step 6: Final answer
    x = 61,013.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.