Home / 85,824,043.70-128,736,065.55-21,127,334.90

Finding the Fourth Proportional to 85,824,043.70, 128,736,065.55 and 21,127,334.90

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Solution

The fourth proportional to 85,824,043.70, 128,736,065.55 and 21,127,334.90 is: 31,691,002.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,043.70 : 128,736,065.55 = 21,127,334.90 : x
  2. Step 2: Convert to fraction form
    85,824,043.70/128,736,065.55 = 21,127,334.90/x
  3. Step 3: Cross multiply
    85,824,043.70x = 128,736,065.55 × 21,127,334.90
  4. Step 4: Simplify right side
    85,824,043.70x = 2,719,849,970,583,202.50
  5. Step 5: Solve for x
    x = 2,719,849,970,583,202.50/85,824,043.70
  6. Step 6: Final answer
    x = 31,691,002.35

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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.