Home / 85,824,016.70-128,736,025.05-21,127,307.90

Finding the Fourth Proportional to 85,824,016.70, 128,736,025.05 and 21,127,307.90

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Solution

The fourth proportional to 85,824,016.70, 128,736,025.05 and 21,127,307.90 is: 31,690,961.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,016.70 : 128,736,025.05 = 21,127,307.90 : x
  2. Step 2: Convert to fraction form
    85,824,016.70/128,736,025.05 = 21,127,307.90/x
  3. Step 3: Cross multiply
    85,824,016.70x = 128,736,025.05 × 21,127,307.90
  4. Step 4: Simplify right side
    85,824,016.70x = 2,719,845,639,053,462.50
  5. Step 5: Solve for x
    x = 2,719,845,639,053,462.50/85,824,016.70
  6. Step 6: Final answer
    x = 31,690,961.85

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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.