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Finding the Fourth Proportional to 104,137.56, 143,710.20 and 56,390.76

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Solution

The fourth proportional to 104,137.56, 143,710.20 and 56,390.76 is: 77,819.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,137.56 : 143,710.20 = 56,390.76 : x
  2. Step 2: Convert to fraction form
    104,137.56/143,710.20 = 56,390.76/x
  3. Step 3: Cross multiply
    104,137.56x = 143,710.20 × 56,390.76
  4. Step 4: Simplify right side
    104,137.56x = 8,103,927,397.75
  5. Step 5: Solve for x
    x = 8,103,927,397.75/104,137.56
  6. Step 6: Final answer
    x = 77,819.45

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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.