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Finding the Fourth Proportional to 89,671.36, 123,741.72 and 51,428.92

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Solution

The fourth proportional to 89,671.36, 123,741.72 and 51,428.92 is: 70,969.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,671.36 : 123,741.72 = 51,428.92 : x
  2. Step 2: Convert to fraction form
    89,671.36/123,741.72 = 51,428.92/x
  3. Step 3: Cross multiply
    89,671.36x = 123,741.72 × 51,428.92
  4. Step 4: Simplify right side
    89,671.36x = 6,363,903,018.54
  5. Step 5: Solve for x
    x = 6,363,903,018.54/89,671.36
  6. Step 6: Final answer
    x = 70,969.18

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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.