Home / 78,807,612.20-118,211,418.30-71,154,861.80

Finding the Fourth Proportional to 78,807,612.20, 118,211,418.30 and 71,154,861.80

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Solution

The fourth proportional to 78,807,612.20, 118,211,418.30 and 71,154,861.80 is: 106,732,292.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,807,612.20 : 118,211,418.30 = 71,154,861.80 : x
  2. Step 2: Convert to fraction form
    78,807,612.20/118,211,418.30 = 71,154,861.80/x
  3. Step 3: Cross multiply
    78,807,612.20x = 118,211,418.30 × 71,154,861.80
  4. Step 4: Simplify right side
    78,807,612.20x = 8,411,317,132,318,490
  5. Step 5: Solve for x
    x = 8,411,317,132,318,490/78,807,612.20
  6. Step 6: Final answer
    x = 106,732,292.70

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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.