Home / 78,639,280.24-117,958,818.28-21,131,552.70

Finding the Fourth Proportional to 78,639,280.24, 117,958,818.28 and 21,131,552.70

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Solution

The fourth proportional to 78,639,280.24, 117,958,818.28 and 21,131,552.70 is: 31,697,301.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639,280.24 : 117,958,818.28 = 21,131,552.70 : x
  2. Step 2: Convert to fraction form
    78,639,280.24/117,958,818.28 = 21,131,552.70/x
  3. Step 3: Cross multiply
    78,639,280.24x = 117,958,818.28 × 21,131,552.70
  4. Step 4: Simplify right side
    78,639,280.24x = 2,492,652,984,913,543.50
  5. Step 5: Solve for x
    x = 2,492,652,984,913,543.50/78,639,280.24
  6. Step 6: Final answer
    x = 31,697,301.62

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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.