Home / 155,037.20-213,948.61-87,054.71

Finding the Fourth Proportional to 155,037.20, 213,948.61 and 87,054.71

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Solution

The fourth proportional to 155,037.20, 213,948.61 and 87,054.71 is: 120,133.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,037.20 : 213,948.61 = 87,054.71 : x
  2. Step 2: Convert to fraction form
    155,037.20/213,948.61 = 87,054.71/x
  3. Step 3: Cross multiply
    155,037.20x = 213,948.61 × 87,054.71
  4. Step 4: Simplify right side
    155,037.20x = 18,625,232,911.07
  5. Step 5: Solve for x
    x = 18,625,232,911.07/155,037.20
  6. Step 6: Final answer
    x = 120,133.96

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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.