Home / 71,811.48-99,088.20-39,979.56

Finding the Fourth Proportional to 71,811.48, 99,088.20 and 39,979.56

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Solution

The fourth proportional to 71,811.48, 99,088.20 and 39,979.56 is: 55,165.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,811.48 : 99,088.20 = 39,979.56 : x
  2. Step 2: Convert to fraction form
    71,811.48/99,088.20 = 39,979.56/x
  3. Step 3: Cross multiply
    71,811.48x = 99,088.20 × 39,979.56
  4. Step 4: Simplify right side
    71,811.48x = 3,961,502,637.19
  5. Step 5: Solve for x
    x = 3,961,502,637.19/71,811.48
  6. Step 6: Final answer
    x = 55,165.31

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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.