Home / 105,149.12-145,106.37-57,402.95

Finding the Fourth Proportional to 105,149.12, 145,106.37 and 57,402.95

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Solution

The fourth proportional to 105,149.12, 145,106.37 and 57,402.95 is: 79,216.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,149.12 : 145,106.37 = 57,402.95 : x
  2. Step 2: Convert to fraction form
    105,149.12/145,106.37 = 57,402.95/x
  3. Step 3: Cross multiply
    105,149.12x = 145,106.37 × 57,402.95
  4. Step 4: Simplify right side
    105,149.12x = 8,329,532,976.26
  5. Step 5: Solve for x
    x = 8,329,532,976.26/105,149.12
  6. Step 6: Final answer
    x = 79,216.39

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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.