Home / 71,220.47-98,282.57-39,388.68

Finding the Fourth Proportional to 71,220.47, 98,282.57 and 39,388.68

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Solution

The fourth proportional to 71,220.47, 98,282.57 and 39,388.68 is: 54,355.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,220.47 : 98,282.57 = 39,388.68 : x
  2. Step 2: Convert to fraction form
    71,220.47/98,282.57 = 39,388.68/x
  3. Step 3: Cross multiply
    71,220.47x = 98,282.57 × 39,388.68
  4. Step 4: Simplify right side
    71,220.47x = 3,871,220,502.36
  5. Step 5: Solve for x
    x = 3,871,220,502.36/71,220.47
  6. Step 6: Final answer
    x = 54,355.45

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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.