Home / 142,143.78-213,225.93-40,937.70

Finding the Fourth Proportional to 142,143.78, 213,225.93 and 40,937.70

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Solution

The fourth proportional to 142,143.78, 213,225.93 and 40,937.70 is: 61,409.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,143.78 : 213,225.93 = 40,937.70 : x
  2. Step 2: Convert to fraction form
    142,143.78/213,225.93 = 40,937.70/x
  3. Step 3: Cross multiply
    142,143.78x = 213,225.93 × 40,937.70
  4. Step 4: Simplify right side
    142,143.78x = 8,728,979,154.56
  5. Step 5: Solve for x
    x = 8,728,979,154.56/142,143.78
  6. Step 6: Final answer
    x = 61,409.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.