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Finding the Fourth Proportional to 84,703.59, 127,040.81 and 31,389.39

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Solution

The fourth proportional to 84,703.59, 127,040.81 and 31,389.39 is: 47,078.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,703.59 : 127,040.81 = 31,389.39 : x
  2. Step 2: Convert to fraction form
    84,703.59/127,040.81 = 31,389.39/x
  3. Step 3: Cross multiply
    84,703.59x = 127,040.81 × 31,389.39
  4. Step 4: Simplify right side
    84,703.59x = 3,987,733,374.06
  5. Step 5: Solve for x
    x = 3,987,733,374.06/84,703.59
  6. Step 6: Final answer
    x = 47,078.68

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1.5x scale

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.