Home / 119,123,999.40-178,685,999.10-78,309,330.60

Finding the Fourth Proportional to 119,123,999.40, 178,685,999.10 and 78,309,330.60

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Solution

The fourth proportional to 119,123,999.40, 178,685,999.10 and 78,309,330.60 is: 117,463,995.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,123,999.40 : 178,685,999.10 = 78,309,330.60 : x
  2. Step 2: Convert to fraction form
    119,123,999.40/178,685,999.10 = 78,309,330.60/x
  3. Step 3: Cross multiply
    119,123,999.40x = 178,685,999.10 × 78,309,330.60
  4. Step 4: Simplify right side
    119,123,999.40x = 13,992,780,977,113,200
  5. Step 5: Solve for x
    x = 13,992,780,977,113,200/119,123,999.40
  6. Step 6: Final answer
    x = 117,463,995.90

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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.