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Finding the Fourth Proportional to 90,415.76, 124,773.14 and 50,129.53

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Solution

The fourth proportional to 90,415.76, 124,773.14 and 50,129.53 is: 69,178.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,415.76 : 124,773.14 = 50,129.53 : x
  2. Step 2: Convert to fraction form
    90,415.76/124,773.14 = 50,129.53/x
  3. Step 3: Cross multiply
    90,415.76x = 124,773.14 × 50,129.53
  4. Step 4: Simplify right side
    90,415.76x = 6,254,818,240.96
  5. Step 5: Solve for x
    x = 6,254,818,240.96/90,415.76
  6. Step 6: Final answer
    x = 69,178.41

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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.