Home / 119,123,115.40-178,684,673.10-78,308,446.60

Finding the Fourth Proportional to 119,123,115.40, 178,684,673.10 and 78,308,446.60

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Solution

The fourth proportional to 119,123,115.40, 178,684,673.10 and 78,308,446.60 is: 117,462,669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,123,115.40 : 178,684,673.10 = 78,308,446.60 : x
  2. Step 2: Convert to fraction form
    119,123,115.40/178,684,673.10 = 78,308,446.60/x
  3. Step 3: Cross multiply
    119,123,115.40x = 178,684,673.10 × 78,308,446.60
  4. Step 4: Simplify right side
    119,123,115.40x = 13,992,519,181,689,804
  5. Step 5: Solve for x
    x = 13,992,519,181,689,804/119,123,115.40
  6. Step 6: Final answer
    x = 117,462,669.90

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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.