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Finding the Fourth Proportional to 104,431.68, 144,111.56 and 56,683.80

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Solution

The fourth proportional to 104,431.68, 144,111.56 and 56,683.80 is: 78,221.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,431.68 : 144,111.56 = 56,683.80 : x
  2. Step 2: Convert to fraction form
    104,431.68/144,111.56 = 56,683.80/x
  3. Step 3: Cross multiply
    104,431.68x = 144,111.56 × 56,683.80
  4. Step 4: Simplify right side
    104,431.68x = 8,168,790,561.31
  5. Step 5: Solve for x
    x = 8,168,790,561.31/104,431.68
  6. Step 6: Final answer
    x = 78,221.38

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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.