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Finding the Fourth Proportional to 79,703.48, 109,991.12 and 47,872.92

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Solution

The fourth proportional to 79,703.48, 109,991.12 and 47,872.92 is: 66,064.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,703.48 : 109,991.12 = 47,872.92 : x
  2. Step 2: Convert to fraction form
    79,703.48/109,991.12 = 47,872.92/x
  3. Step 3: Cross multiply
    79,703.48x = 109,991.12 × 47,872.92
  4. Step 4: Simplify right side
    79,703.48x = 5,265,596,088.47
  5. Step 5: Solve for x
    x = 5,265,596,088.47/79,703.48
  6. Step 6: Final answer
    x = 66,064.82

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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.