Home / 85,824,141.30-128,736,211.95-81,842,829.30

Finding the Fourth Proportional to 85,824,141.30, 128,736,211.95 and 81,842,829.30

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Solution

The fourth proportional to 85,824,141.30, 128,736,211.95 and 81,842,829.30 is: 122,764,243.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,141.30 : 128,736,211.95 = 81,842,829.30 : x
  2. Step 2: Convert to fraction form
    85,824,141.30/128,736,211.95 = 81,842,829.30/x
  3. Step 3: Cross multiply
    85,824,141.30x = 128,736,211.95 × 81,842,829.30
  4. Step 4: Simplify right side
    85,824,141.30x = 10,536,135,819,352,470
  5. Step 5: Solve for x
    x = 10,536,135,819,352,470/85,824,141.30
  6. Step 6: Final answer
    x = 122,764,243.95

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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.