Home / 208,079,138.30-312,024,229.05-78,643,730.30

Finding the Fourth Proportional to 208,079,138.30, 312,024,229.05 and 78,643,730.30

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Solution

The fourth proportional to 208,079,138.30, 312,024,229.05 and 78,643,730.30 is: 117,929,887.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,079,138.30 : 312,024,229.05 = 78,643,730.30 : x
  2. Step 2: Convert to fraction form
    208,079,138.30/312,024,229.05 = 78,643,730.30/x
  3. Step 3: Cross multiply
    208,079,138.30x = 312,024,229.05 × 78,643,730.30
  4. Step 4: Simplify right side
    208,079,138.30x = 24,538,749,316,473,624
  5. Step 5: Solve for x
    x = 24,538,749,316,473,624/208,079,138.30
  6. Step 6: Final answer
    x = 117,929,887.24

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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.