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Finding the Fourth Proportional to 79,392.61, 109,557.70 and 47,128.58

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Solution

The fourth proportional to 79,392.61, 109,557.70 and 47,128.58 is: 65,035.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,392.61 : 109,557.70 = 47,128.58 : x
  2. Step 2: Convert to fraction form
    79,392.61/109,557.70 = 47,128.58/x
  3. Step 3: Cross multiply
    79,392.61x = 109,557.70 × 47,128.58
  4. Step 4: Simplify right side
    79,392.61x = 5,163,298,163.46
  5. Step 5: Solve for x
    x = 5,163,298,163.46/79,392.61
  6. Step 6: Final answer
    x = 65,035.00

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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.