Home / 86,361.12-119,142.09-56,136.78

Finding the Fourth Proportional to 86,361.12, 119,142.09 and 56,136.78

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Solution

The fourth proportional to 86,361.12, 119,142.09 and 56,136.78 is: 77,445.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,361.12 : 119,142.09 = 56,136.78 : x
  2. Step 2: Convert to fraction form
    86,361.12/119,142.09 = 56,136.78/x
  3. Step 3: Cross multiply
    86,361.12x = 119,142.09 × 56,136.78
  4. Step 4: Simplify right side
    86,361.12x = 6,688,253,295.07
  5. Step 5: Solve for x
    x = 6,688,253,295.07/86,361.12
  6. Step 6: Final answer
    x = 77,445.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.