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Finding the Fourth Proportional to 79,335, 109,475.28 and 45,336.72

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Solution

The fourth proportional to 79,335, 109,475.28 and 45,336.72 is: 62,560.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,335 : 109,475.28 = 45,336.72 : x
  2. Step 2: Convert to fraction form
    79,335/109,475.28 = 45,336.72/x
  3. Step 3: Cross multiply
    79,335x = 109,475.28 × 45,336.72
  4. Step 4: Simplify right side
    79,335x = 4,963,250,116.28
  5. Step 5: Solve for x
    x = 4,963,250,116.28/79,335
  6. Step 6: Final answer
    x = 62,560.66

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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.