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Finding the Fourth Proportional to 103,954.68, 143,459.82 and 61,520.76

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Solution

The fourth proportional to 103,954.68, 143,459.82 and 61,520.76 is: 84,900.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,954.68 : 143,459.82 = 61,520.76 : x
  2. Step 2: Convert to fraction form
    103,954.68/143,459.82 = 61,520.76/x
  3. Step 3: Cross multiply
    103,954.68x = 143,459.82 × 61,520.76
  4. Step 4: Simplify right side
    103,954.68x = 8,825,757,155.86
  5. Step 5: Solve for x
    x = 8,825,757,155.86/103,954.68
  6. Step 6: Final answer
    x = 84,900.05

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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.