Home / 90,644,005.10-135,966,007.65-78,314,573.90

Finding the Fourth Proportional to 90,644,005.10, 135,966,007.65 and 78,314,573.90

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Solution

The fourth proportional to 90,644,005.10, 135,966,007.65 and 78,314,573.90 is: 117,471,860.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,644,005.10 : 135,966,007.65 = 78,314,573.90 : x
  2. Step 2: Convert to fraction form
    90,644,005.10/135,966,007.65 = 78,314,573.90/x
  3. Step 3: Cross multiply
    90,644,005.10x = 135,966,007.65 × 78,314,573.90
  4. Step 4: Simplify right side
    90,644,005.10x = 10,648,119,953,993,892
  5. Step 5: Solve for x
    x = 10,648,119,953,993,892/90,644,005.10
  6. Step 6: Final answer
    x = 117,471,860.85

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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.