Home / 278,318.17-417,494.11-78,653.50

Finding the Fourth Proportional to 278,318.17, 417,494.11 and 78,653.50

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Solution

The fourth proportional to 278,318.17, 417,494.11 and 78,653.50 is: 117,985.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,318.17 : 417,494.11 = 78,653.50 : x
  2. Step 2: Convert to fraction form
    278,318.17/417,494.11 = 78,653.50/x
  3. Step 3: Cross multiply
    278,318.17x = 417,494.11 × 78,653.50
  4. Step 4: Simplify right side
    278,318.17x = 32,837,371,740.52
  5. Step 5: Solve for x
    x = 32,837,371,740.52/278,318.17
  6. Step 6: Final answer
    x = 117,985.01

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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.