Home / 210,867.20-315,916.80-99,814.40

Finding the Fourth Proportional to 210,867.20, 315,916.80 and 99,814.40

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Solution

The fourth proportional to 210,867.20, 315,916.80 and 99,814.40 is: 149,539.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,867.20 : 315,916.80 = 99,814.40 : x
  2. Step 2: Convert to fraction form
    210,867.20/315,916.80 = 99,814.40/x
  3. Step 3: Cross multiply
    210,867.20x = 315,916.80 × 99,814.40
  4. Step 4: Simplify right side
    210,867.20x = 31,533,045,841.92
  5. Step 5: Solve for x
    x = 31,533,045,841.92/210,867.20
  6. Step 6: Final answer
    x = 149,539.83

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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.