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Finding the Fourth Proportional to 90,867, 125,404.14 and 51,130.68

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Solution

The fourth proportional to 90,867, 125,404.14 and 51,130.68 is: 70,564.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,867 : 125,404.14 = 51,130.68 : x
  2. Step 2: Convert to fraction form
    90,867/125,404.14 = 51,130.68/x
  3. Step 3: Cross multiply
    90,867x = 125,404.14 × 51,130.68
  4. Step 4: Simplify right side
    90,867x = 6,411,998,953.02
  5. Step 5: Solve for x
    x = 6,411,998,953.02/90,867
  6. Step 6: Final answer
    x = 70,564.66

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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.