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Finding the Fourth Proportional to 39,978.80, 59,894.40 and 23,346.80

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Solution

The fourth proportional to 39,978.80, 59,894.40 and 23,346.80 is: 34,977.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,978.80 : 59,894.40 = 23,346.80 : x
  2. Step 2: Convert to fraction form
    39,978.80/59,894.40 = 23,346.80/x
  3. Step 3: Cross multiply
    39,978.80x = 59,894.40 × 23,346.80
  4. Step 4: Simplify right side
    39,978.80x = 1,398,342,577.92
  5. Step 5: Solve for x
    x = 1,398,342,577.92/39,978.80
  6. Step 6: Final answer
    x = 34,977.10

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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.