Home / 210,382.11-315,575.94-70,140.78

Finding the Fourth Proportional to 210,382.11, 315,575.94 and 70,140.78

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Solution

The fourth proportional to 210,382.11, 315,575.94 and 70,140.78 is: 105,212.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,382.11 : 315,575.94 = 70,140.78 : x
  2. Step 2: Convert to fraction form
    210,382.11/315,575.94 = 70,140.78/x
  3. Step 3: Cross multiply
    210,382.11x = 315,575.94 × 70,140.78
  4. Step 4: Simplify right side
    210,382.11x = 22,134,742,580.83
  5. Step 5: Solve for x
    x = 22,134,742,580.83/210,382.11
  6. Step 6: Final answer
    x = 105,212.10

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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.