Home / 102,900.73-142,003.55-57,578.80

Finding the Fourth Proportional to 102,900.73, 142,003.55 and 57,578.80

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Solution

The fourth proportional to 102,900.73, 142,003.55 and 57,578.80 is: 79,459.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,900.73 : 142,003.55 = 57,578.80 : x
  2. Step 2: Convert to fraction form
    102,900.73/142,003.55 = 57,578.80/x
  3. Step 3: Cross multiply
    102,900.73x = 142,003.55 × 57,578.80
  4. Step 4: Simplify right side
    102,900.73x = 8,176,394,004.74
  5. Step 5: Solve for x
    x = 8,176,394,004.74/102,900.73
  6. Step 6: Final answer
    x = 79,459.05

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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.