Home / 71,988.10-99,342.90-39,723.01

Finding the Fourth Proportional to 71,988.10, 99,342.90 and 39,723.01

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Solution

The fourth proportional to 71,988.10, 99,342.90 and 39,723.01 is: 54,817.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,988.10 : 99,342.90 = 39,723.01 : x
  2. Step 2: Convert to fraction form
    71,988.10/99,342.90 = 39,723.01/x
  3. Step 3: Cross multiply
    71,988.10x = 99,342.90 × 39,723.01
  4. Step 4: Simplify right side
    71,988.10x = 3,946,199,010.13
  5. Step 5: Solve for x
    x = 3,946,199,010.13/71,988.10
  6. Step 6: Final answer
    x = 54,817.38

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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.