Home / 139,533,491.20-209,424,652.80-81,953,766.40

Finding the Fourth Proportional to 139,533,491.20, 209,424,652.80 and 81,953,766.40

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Solution

The fourth proportional to 139,533,491.20, 209,424,652.80 and 81,953,766.40 is: 123,003,724.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,533,491.20 : 209,424,652.80 = 81,953,766.40 : x
  2. Step 2: Convert to fraction form
    139,533,491.20/209,424,652.80 = 81,953,766.40/x
  3. Step 3: Cross multiply
    139,533,491.20x = 209,424,652.80 × 81,953,766.40
  4. Step 4: Simplify right side
    139,533,491.20x = 17,163,139,073,972,308
  5. Step 5: Solve for x
    x = 17,163,139,073,972,308/139,533,491.20
  6. Step 6: Final answer
    x = 123,003,724.24

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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.