Home / 91,790,285.40-137,685,428.10-86,405,016.60

Finding the Fourth Proportional to 91,790,285.40, 137,685,428.10 and 86,405,016.60

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Solution

The fourth proportional to 91,790,285.40, 137,685,428.10 and 86,405,016.60 is: 129,607,524.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,790,285.40 : 137,685,428.10 = 86,405,016.60 : x
  2. Step 2: Convert to fraction form
    91,790,285.40/137,685,428.10 = 86,405,016.60/x
  3. Step 3: Cross multiply
    91,790,285.40x = 137,685,428.10 × 86,405,016.60
  4. Step 4: Simplify right side
    91,790,285.40x = 11,896,711,700,558,606
  5. Step 5: Solve for x
    x = 11,896,711,700,558,606/91,790,285.40
  6. Step 6: Final answer
    x = 129,607,524.90

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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.