Home / 120,309,969.67-180,488,155.64-51,221,507.90

Finding the Fourth Proportional to 120,309,969.67, 180,488,155.64 and 51,221,507.90

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Solution

The fourth proportional to 120,309,969.67, 180,488,155.64 and 51,221,507.90 is: 76,842,139.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,309,969.67 : 180,488,155.64 = 51,221,507.90 : x
  2. Step 2: Convert to fraction form
    120,309,969.67/180,488,155.64 = 51,221,507.90/x
  3. Step 3: Cross multiply
    120,309,969.67x = 180,488,155.64 × 51,221,507.90
  4. Step 4: Simplify right side
    120,309,969.67x = 9,244,875,488,812,142
  5. Step 5: Solve for x
    x = 9,244,875,488,812,142/120,309,969.67
  6. Step 6: Final answer
    x = 76,842,139.64

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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.