Home / 72,069.10-99,458.70-39,808.22

Finding the Fourth Proportional to 72,069.10, 99,458.70 and 39,808.22

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Solution

The fourth proportional to 72,069.10, 99,458.70 and 39,808.22 is: 54,937.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,069.10 : 99,458.70 = 39,808.22 : x
  2. Step 2: Convert to fraction form
    72,069.10/99,458.70 = 39,808.22/x
  3. Step 3: Cross multiply
    72,069.10x = 99,458.70 × 39,808.22
  4. Step 4: Simplify right side
    72,069.10x = 3,959,273,810.51
  5. Step 5: Solve for x
    x = 3,959,273,810.51/72,069.10
  6. Step 6: Final answer
    x = 54,937.19

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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.