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Finding the Fourth Proportional to 78,646.77, 108,438.21 and 64,253.27

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Solution

The fourth proportional to 78,646.77, 108,438.21 and 64,253.27 is: 88,592.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,646.77 : 108,438.21 = 64,253.27 : x
  2. Step 2: Convert to fraction form
    78,646.77/108,438.21 = 64,253.27/x
  3. Step 3: Cross multiply
    78,646.77x = 108,438.21 × 64,253.27
  4. Step 4: Simplify right side
    78,646.77x = 6,967,509,856.54
  5. Step 5: Solve for x
    x = 6,967,509,856.54/78,646.77
  6. Step 6: Final answer
    x = 88,592.45

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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.