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Finding the Fourth Proportional to 90,115, 124,358.76 and 50,371

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Solution

The fourth proportional to 90,115, 124,358.76 and 50,371 is: 69,512.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,115 : 124,358.76 = 50,371 : x
  2. Step 2: Convert to fraction form
    90,115/124,358.76 = 50,371/x
  3. Step 3: Cross multiply
    90,115x = 124,358.76 × 50,371
  4. Step 4: Simplify right side
    90,115x = 6,264,075,099.96
  5. Step 5: Solve for x
    x = 6,264,075,099.96/90,115
  6. Step 6: Final answer
    x = 69,512.01

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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.