Home / 85,890,490.40-128,835,735.60-76,484,640.80

Finding the Fourth Proportional to 85,890,490.40, 128,835,735.60 and 76,484,640.80

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Solution

The fourth proportional to 85,890,490.40, 128,835,735.60 and 76,484,640.80 is: 114,726,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890,490.40 : 128,835,735.60 = 76,484,640.80 : x
  2. Step 2: Convert to fraction form
    85,890,490.40/128,835,735.60 = 76,484,640.80/x
  3. Step 3: Cross multiply
    85,890,490.40x = 128,835,735.60 × 76,484,640.80
  4. Step 4: Simplify right side
    85,890,490.40x = 9,853,954,959,569,772
  5. Step 5: Solve for x
    x = 9,853,954,959,569,772/85,890,490.40
  6. Step 6: Final answer
    x = 114,726,961.20

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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.