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Finding the Fourth Proportional to 124,685.40, 186,916.86 and 54,509.16

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Solution

The fourth proportional to 124,685.40, 186,916.86 and 54,509.16 is: 81,715.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,685.40 : 186,916.86 = 54,509.16 : x
  2. Step 2: Convert to fraction form
    124,685.40/186,916.86 = 54,509.16/x
  3. Step 3: Cross multiply
    124,685.40x = 186,916.86 × 54,509.16
  4. Step 4: Simplify right side
    124,685.40x = 10,188,681,028.44
  5. Step 5: Solve for x
    x = 10,188,681,028.44/124,685.40
  6. Step 6: Final answer
    x = 81,715.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.