Home / 85,811,032.80-128,716,549.20-39,752,812.80

Finding the Fourth Proportional to 85,811,032.80, 128,716,549.20 and 39,752,812.80

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Solution

The fourth proportional to 85,811,032.80, 128,716,549.20 and 39,752,812.80 is: 59,629,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,811,032.80 : 128,716,549.20 = 39,752,812.80 : x
  2. Step 2: Convert to fraction form
    85,811,032.80/128,716,549.20 = 39,752,812.80/x
  3. Step 3: Cross multiply
    85,811,032.80x = 128,716,549.20 × 39,752,812.80
  4. Step 4: Simplify right side
    85,811,032.80x = 5,116,844,884,609,589
  5. Step 5: Solve for x
    x = 5,116,844,884,609,589/85,811,032.80
  6. Step 6: Final answer
    x = 59,629,219.20

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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.