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Finding the Fourth Proportional to 64,280.35, 88,696.32 and 40,390.21

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Solution

The fourth proportional to 64,280.35, 88,696.32 and 40,390.21 is: 55,731.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,280.35 : 88,696.32 = 40,390.21 : x
  2. Step 2: Convert to fraction form
    64,280.35/88,696.32 = 40,390.21/x
  3. Step 3: Cross multiply
    64,280.35x = 88,696.32 × 40,390.21
  4. Step 4: Simplify right side
    64,280.35x = 3,582,462,991.03
  5. Step 5: Solve for x
    x = 3,582,462,991.03/64,280.35
  6. Step 6: Final answer
    x = 55,731.85

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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.