Home / 90,038.18-135,142.01-45,696.75

Finding the Fourth Proportional to 90,038.18, 135,142.01 and 45,696.75

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Solution

The fourth proportional to 90,038.18, 135,142.01 and 45,696.75 is: 68,588.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,038.18 : 135,142.01 = 45,696.75 : x
  2. Step 2: Convert to fraction form
    90,038.18/135,142.01 = 45,696.75/x
  3. Step 3: Cross multiply
    90,038.18x = 135,142.01 × 45,696.75
  4. Step 4: Simplify right side
    90,038.18x = 6,175,550,588.35
  5. Step 5: Solve for x
    x = 6,175,550,588.35/90,038.18
  6. Step 6: Final answer
    x = 68,588.14

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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.