Home / 155,041.20-213,954.12-87,058.72

Finding the Fourth Proportional to 155,041.20, 213,954.12 and 87,058.72

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Solution

The fourth proportional to 155,041.20, 213,954.12 and 87,058.72 is: 120,139.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,041.20 : 213,954.12 = 87,058.72 : x
  2. Step 2: Convert to fraction form
    155,041.20/213,954.12 = 87,058.72/x
  3. Step 3: Cross multiply
    155,041.20x = 213,954.12 × 87,058.72
  4. Step 4: Simplify right side
    155,041.20x = 18,626,571,825.93
  5. Step 5: Solve for x
    x = 18,626,571,825.93/155,041.20
  6. Step 6: Final answer
    x = 120,139.50

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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.