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Finding the Fourth Proportional to 90,855, 125,384.76 and 53,151.12

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Solution

The fourth proportional to 90,855, 125,384.76 and 53,151.12 is: 73,351.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,855 : 125,384.76 = 53,151.12 : x
  2. Step 2: Convert to fraction form
    90,855/125,384.76 = 53,151.12/x
  3. Step 3: Cross multiply
    90,855x = 125,384.76 × 53,151.12
  4. Step 4: Simplify right side
    90,855x = 6,664,340,424.93
  5. Step 5: Solve for x
    x = 6,664,340,424.93/90,855
  6. Step 6: Final answer
    x = 73,351.39

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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.