Home / 85,968,660.80-128,952,991.20-74,771,220.80

Finding the Fourth Proportional to 85,968,660.80, 128,952,991.20 and 74,771,220.80

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Solution

The fourth proportional to 85,968,660.80, 128,952,991.20 and 74,771,220.80 is: 112,156,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,968,660.80 : 128,952,991.20 = 74,771,220.80 : x
  2. Step 2: Convert to fraction form
    85,968,660.80/128,952,991.20 = 74,771,220.80/x
  3. Step 3: Cross multiply
    85,968,660.80x = 128,952,991.20 × 74,771,220.80
  4. Step 4: Simplify right side
    85,968,660.80x = 9,641,972,577,835,656
  5. Step 5: Solve for x
    x = 9,641,972,577,835,656/85,968,660.80
  6. Step 6: Final answer
    x = 112,156,831.20

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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.