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Finding the Fourth Proportional to 268,858,408.40, 403,287,612.60 and 87,123,957.20

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Solution

The fourth proportional to 268,858,408.40, 403,287,612.60 and 87,123,957.20 is: 130,685,935.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,858,408.40 : 403,287,612.60 = 87,123,957.20 : x
  2. Step 2: Convert to fraction form
    268,858,408.40/403,287,612.60 = 87,123,957.20/x
  3. Step 3: Cross multiply
    268,858,408.40x = 403,287,612.60 × 87,123,957.20
  4. Step 4: Simplify right side
    268,858,408.40x = 35,136,012,699,452,584
  5. Step 5: Solve for x
    x = 35,136,012,699,452,584/268,858,408.40
  6. Step 6: Final answer
    x = 130,685,935.80

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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.