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Finding the Fourth Proportional to 115,302.80, 172,435.80 and 96,640.40

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Solution

The fourth proportional to 115,302.80, 172,435.80 and 96,640.40 is: 144,526.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,302.80 : 172,435.80 = 96,640.40 : x
  2. Step 2: Convert to fraction form
    115,302.80/172,435.80 = 96,640.40/x
  3. Step 3: Cross multiply
    115,302.80x = 172,435.80 × 96,640.40
  4. Step 4: Simplify right side
    115,302.80x = 16,664,264,686.32
  5. Step 5: Solve for x
    x = 16,664,264,686.32/115,302.80
  6. Step 6: Final answer
    x = 144,526.11

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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.