Home / 39,977,145-55,168,468.74-21,642,581.16

Finding the Fourth Proportional to 39,977,145, 55,168,468.74 and 21,642,581.16

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Solution

The fourth proportional to 39,977,145, 55,168,468.74 and 21,642,581.16 is: 29,866,766.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,977,145 : 55,168,468.74 = 21,642,581.16 : x
  2. Step 2: Convert to fraction form
    39,977,145/55,168,468.74 = 21,642,581.16/x
  3. Step 3: Cross multiply
    39,977,145x = 55,168,468.74 × 21,642,581.16
  4. Step 4: Simplify right side
    39,977,145x = 1,193,988,062,178,373
  5. Step 5: Solve for x
    x = 1,193,988,062,178,373/39,977,145
  6. Step 6: Final answer
    x = 29,866,766.68

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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.