Home / 115,140.12-158,803.32-74,866.92

Finding the Fourth Proportional to 115,140.12, 158,803.32 and 74,866.92

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Solution

The fourth proportional to 115,140.12, 158,803.32 and 74,866.92 is: 103,257.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,140.12 : 158,803.32 = 74,866.92 : x
  2. Step 2: Convert to fraction form
    115,140.12/158,803.32 = 74,866.92/x
  3. Step 3: Cross multiply
    115,140.12x = 158,803.32 × 74,866.92
  4. Step 4: Simplify right side
    115,140.12x = 11,889,115,454.17
  5. Step 5: Solve for x
    x = 11,889,115,454.17/115,140.12
  6. Step 6: Final answer
    x = 103,257.80

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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.