Home / 78,880,363.40-118,320,545.10-77,746,622.60

Finding the Fourth Proportional to 78,880,363.40, 118,320,545.10 and 77,746,622.60

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Solution

The fourth proportional to 78,880,363.40, 118,320,545.10 and 77,746,622.60 is: 116,619,933.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,880,363.40 : 118,320,545.10 = 77,746,622.60 : x
  2. Step 2: Convert to fraction form
    78,880,363.40/118,320,545.10 = 77,746,622.60/x
  3. Step 3: Cross multiply
    78,880,363.40x = 118,320,545.10 × 77,746,622.60
  4. Step 4: Simplify right side
    78,880,363.40x = 9,199,022,765,715,978
  5. Step 5: Solve for x
    x = 9,199,022,765,715,978/78,880,363.40
  6. Step 6: Final answer
    x = 116,619,933.90

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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.