Home / 42,712.80-64,069.20-40,671.60

Finding the Fourth Proportional to 42,712.80, 64,069.20 and 40,671.60

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Solution

The fourth proportional to 42,712.80, 64,069.20 and 40,671.60 is: 61,007.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,712.80 : 64,069.20 = 40,671.60 : x
  2. Step 2: Convert to fraction form
    42,712.80/64,069.20 = 40,671.60/x
  3. Step 3: Cross multiply
    42,712.80x = 64,069.20 × 40,671.60
  4. Step 4: Simplify right side
    42,712.80x = 2,605,796,874.72
  5. Step 5: Solve for x
    x = 2,605,796,874.72/42,712.80
  6. Step 6: Final answer
    x = 61,007.40

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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.