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Finding the Fourth Proportional to 64,256.78, 88,663.78 and 40,366.54

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Solution

The fourth proportional to 64,256.78, 88,663.78 and 40,366.54 is: 55,699.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,256.78 : 88,663.78 = 40,366.54 : x
  2. Step 2: Convert to fraction form
    64,256.78/88,663.78 = 40,366.54/x
  3. Step 3: Cross multiply
    64,256.78x = 88,663.78 × 40,366.54
  4. Step 4: Simplify right side
    64,256.78x = 3,579,049,477.69
  5. Step 5: Solve for x
    x = 3,579,049,477.69/64,256.78
  6. Step 6: Final answer
    x = 55,699.17

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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.