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Finding the Fourth Proportional to 102,916.40, 154,374.60 and 56,260.40

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Solution

The fourth proportional to 102,916.40, 154,374.60 and 56,260.40 is: 84,390.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,916.40 : 154,374.60 = 56,260.40 : x
  2. Step 2: Convert to fraction form
    102,916.40/154,374.60 = 56,260.40/x
  3. Step 3: Cross multiply
    102,916.40x = 154,374.60 × 56,260.40
  4. Step 4: Simplify right side
    102,916.40x = 8,685,176,745.84
  5. Step 5: Solve for x
    x = 8,685,176,745.84/102,916.40
  6. Step 6: Final answer
    x = 84,390.60

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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.