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Finding the Fourth Proportional to 252,856.31, 348,941.95 and 138,136.87

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Solution

The fourth proportional to 252,856.31, 348,941.95 and 138,136.87 is: 190,629.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,856.31 : 348,941.95 = 138,136.87 : x
  2. Step 2: Convert to fraction form
    252,856.31/348,941.95 = 138,136.87/x
  3. Step 3: Cross multiply
    252,856.31x = 348,941.95 × 138,136.87
  4. Step 4: Simplify right side
    252,856.31x = 48,201,748,094.01
  5. Step 5: Solve for x
    x = 48,201,748,094.01/252,856.31
  6. Step 6: Final answer
    x = 190,629.01

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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.