Home / 139,536,030.80-209,304,046.20-85,788,318.80

Finding the Fourth Proportional to 139,536,030.80, 209,304,046.20 and 85,788,318.80

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Solution

The fourth proportional to 139,536,030.80, 209,304,046.20 and 85,788,318.80 is: 128,682,478.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,536,030.80 : 209,304,046.20 = 85,788,318.80 : x
  2. Step 2: Convert to fraction form
    139,536,030.80/209,304,046.20 = 85,788,318.80/x
  3. Step 3: Cross multiply
    139,536,030.80x = 209,304,046.20 × 85,788,318.80
  4. Step 4: Simplify right side
    139,536,030.80x = 17,955,842,241,535,526
  5. Step 5: Solve for x
    x = 17,955,842,241,535,526/139,536,030.80
  6. Step 6: Final answer
    x = 128,682,478.20

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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.