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Finding the Fourth Proportional to 99,038.57, 148,571.08 and 28,916.87

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Solution

The fourth proportional to 99,038.57, 148,571.08 and 28,916.87 is: 43,379.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,038.57 : 148,571.08 = 28,916.87 : x
  2. Step 2: Convert to fraction form
    99,038.57/148,571.08 = 28,916.87/x
  3. Step 3: Cross multiply
    99,038.57x = 148,571.08 × 28,916.87
  4. Step 4: Simplify right side
    99,038.57x = 4,296,209,790.97
  5. Step 5: Solve for x
    x = 4,296,209,790.97/99,038.57
  6. Step 6: Final answer
    x = 43,379.16

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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.