Home / 85,929,723.12-128,891,089.13-21,231,898.95

Finding the Fourth Proportional to 85,929,723.12, 128,891,089.13 and 21,231,898.95

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Solution

The fourth proportional to 85,929,723.12, 128,891,089.13 and 21,231,898.95 is: 31,846,984.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,929,723.12 : 128,891,089.13 = 21,231,898.95 : x
  2. Step 2: Convert to fraction form
    85,929,723.12/128,891,089.13 = 21,231,898.95/x
  3. Step 3: Cross multiply
    85,929,723.12x = 128,891,089.13 × 21,231,898.95
  4. Step 4: Simplify right side
    85,929,723.12x = 2,736,602,579,857,444
  5. Step 5: Solve for x
    x = 2,736,602,579,857,444/85,929,723.12
  6. Step 6: Final answer
    x = 31,846,984.73

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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.