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Finding the Fourth Proportional to 64,750.16, 89,405.90 and 50,643.20

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Solution

The fourth proportional to 64,750.16, 89,405.90 and 50,643.20 is: 69,927.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,750.16 : 89,405.90 = 50,643.20 : x
  2. Step 2: Convert to fraction form
    64,750.16/89,405.90 = 50,643.20/x
  3. Step 3: Cross multiply
    64,750.16x = 89,405.90 × 50,643.20
  4. Step 4: Simplify right side
    64,750.16x = 4,527,800,174.63
  5. Step 5: Solve for x
    x = 4,527,800,174.63/64,750.16
  6. Step 6: Final answer
    x = 69,927.25

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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.