Home / 211,280.91-317,045.95-78,254.61

Finding the Fourth Proportional to 211,280.91, 317,045.95 and 78,254.61

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Solution

The fourth proportional to 211,280.91, 317,045.95 and 78,254.61 is: 117,428.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,280.91 : 317,045.95 = 78,254.61 : x
  2. Step 2: Convert to fraction form
    211,280.91/317,045.95 = 78,254.61/x
  3. Step 3: Cross multiply
    211,280.91x = 317,045.95 × 78,254.61
  4. Step 4: Simplify right side
    211,280.91x = 24,810,305,784.77
  5. Step 5: Solve for x
    x = 24,810,305,784.77/211,280.91
  6. Step 6: Final answer
    x = 117,428.05

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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.