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Finding the Fourth Proportional to 252,656.06, 348,664.65 and 139,478

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Solution

The fourth proportional to 252,656.06, 348,664.65 and 139,478 is: 192,479.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,656.06 : 348,664.65 = 139,478 : x
  2. Step 2: Convert to fraction form
    252,656.06/348,664.65 = 139,478/x
  3. Step 3: Cross multiply
    252,656.06x = 348,664.65 × 139,478
  4. Step 4: Simplify right side
    252,656.06x = 48,631,048,052.70
  5. Step 5: Solve for x
    x = 48,631,048,052.70/252,656.06
  6. Step 6: Final answer
    x = 192,479.25

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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.