Home / 85,915,403.20-128,943,607.20-85,243,556.80

Finding the Fourth Proportional to 85,915,403.20, 128,943,607.20 and 85,243,556.80

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Solution

The fourth proportional to 85,915,403.20, 128,943,607.20 and 85,243,556.80 is: 127,935,286.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,915,403.20 : 128,943,607.20 = 85,243,556.80 : x
  2. Step 2: Convert to fraction form
    85,915,403.20/128,943,607.20 = 85,243,556.80/x
  3. Step 3: Cross multiply
    85,915,403.20x = 128,943,607.20 × 85,243,556.80
  4. Step 4: Simplify right side
    85,915,403.20x = 10,991,611,704,350,088
  5. Step 5: Solve for x
    x = 10,991,611,704,350,088/85,915,403.20
  6. Step 6: Final answer
    x = 127,935,286.28

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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.