Home / 85,789,722.60-128,703,246.30-28,272,205.80

Finding the Fourth Proportional to 85,789,722.60, 128,703,246.30 and 28,272,205.80

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Solution

The fourth proportional to 85,789,722.60, 128,703,246.30 and 28,272,205.80 is: 42,414,458.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,789,722.60 : 128,703,246.30 = 28,272,205.80 : x
  2. Step 2: Convert to fraction form
    85,789,722.60/128,703,246.30 = 28,272,205.80/x
  3. Step 3: Cross multiply
    85,789,722.60x = 128,703,246.30 × 28,272,205.80
  4. Step 4: Simplify right side
    85,789,722.60x = 3,638,724,666,521,688.50
  5. Step 5: Solve for x
    x = 3,638,724,666,521,688.50/85,789,722.60
  6. Step 6: Final answer
    x = 42,414,458.94

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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.