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Finding the Fourth Proportional to 62,315.78, 86,005.65 and 39,631.12

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Solution

The fourth proportional to 62,315.78, 86,005.65 and 39,631.12 is: 54,697.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,315.78 : 86,005.65 = 39,631.12 : x
  2. Step 2: Convert to fraction form
    62,315.78/86,005.65 = 39,631.12/x
  3. Step 3: Cross multiply
    62,315.78x = 86,005.65 × 39,631.12
  4. Step 4: Simplify right side
    62,315.78x = 3,408,500,235.83
  5. Step 5: Solve for x
    x = 3,408,500,235.83/62,315.78
  6. Step 6: Final answer
    x = 54,697.22

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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.