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Finding the Fourth Proportional to 125,271.68, 172,874.64 and 68,686.64

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Solution

The fourth proportional to 125,271.68, 172,874.64 and 68,686.64 is: 94,787.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,271.68 : 172,874.64 = 68,686.64 : x
  2. Step 2: Convert to fraction form
    125,271.68/172,874.64 = 68,686.64/x
  3. Step 3: Cross multiply
    125,271.68x = 172,874.64 × 68,686.64
  4. Step 4: Simplify right side
    125,271.68x = 11,874,178,162.81
  5. Step 5: Solve for x
    x = 11,874,178,162.81/125,271.68
  6. Step 6: Final answer
    x = 94,787.41

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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.