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Finding the Fourth Proportional to 64,762.40, 89,378.64 and 39,282.08

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Solution

The fourth proportional to 64,762.40, 89,378.64 and 39,282.08 is: 54,213.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,762.40 : 89,378.64 = 39,282.08 : x
  2. Step 2: Convert to fraction form
    64,762.40/89,378.64 = 39,282.08/x
  3. Step 3: Cross multiply
    64,762.40x = 89,378.64 × 39,282.08
  4. Step 4: Simplify right side
    64,762.40x = 3,510,978,886.77
  5. Step 5: Solve for x
    x = 3,510,978,886.77/64,762.40
  6. Step 6: Final answer
    x = 54,213.23

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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.