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Finding the Fourth Proportional to 125,284.32, 172,895.04 and 76,225.32

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Solution

The fourth proportional to 125,284.32, 172,895.04 and 76,225.32 is: 105,192.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,284.32 : 172,895.04 = 76,225.32 : x
  2. Step 2: Convert to fraction form
    125,284.32/172,895.04 = 76,225.32/x
  3. Step 3: Cross multiply
    125,284.32x = 172,895.04 × 76,225.32
  4. Step 4: Simplify right side
    125,284.32x = 13,178,979,750.41
  5. Step 5: Solve for x
    x = 13,178,979,750.41/125,284.32
  6. Step 6: Final answer
    x = 105,192.57

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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.