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Finding the Fourth Proportional to 64,459.64, 96,640.84 and 42,278.60

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Solution

The fourth proportional to 64,459.64, 96,640.84 and 42,278.60 is: 63,386.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,459.64 : 96,640.84 = 42,278.60 : x
  2. Step 2: Convert to fraction form
    64,459.64/96,640.84 = 42,278.60/x
  3. Step 3: Cross multiply
    64,459.64x = 96,640.84 × 42,278.60
  4. Step 4: Simplify right side
    64,459.64x = 4,085,839,418.02
  5. Step 5: Solve for x
    x = 4,085,839,418.02/64,459.64
  6. Step 6: Final answer
    x = 63,386.01

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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.