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Finding the Fourth Proportional to 103,653.80, 143,057.70 and 63,391.40

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Solution

The fourth proportional to 103,653.80, 143,057.70 and 63,391.40 is: 87,489.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,653.80 : 143,057.70 = 63,391.40 : x
  2. Step 2: Convert to fraction form
    103,653.80/143,057.70 = 63,391.40/x
  3. Step 3: Cross multiply
    103,653.80x = 143,057.70 × 63,391.40
  4. Step 4: Simplify right side
    103,653.80x = 9,068,627,883.78
  5. Step 5: Solve for x
    x = 9,068,627,883.78/103,653.80
  6. Step 6: Final answer
    x = 87,489.58

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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.