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Finding the Fourth Proportional to 193,420, 266,920.56 and 112,903.36

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Solution

The fourth proportional to 193,420, 266,920.56 and 112,903.36 is: 155,807.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,420 : 266,920.56 = 112,903.36 : x
  2. Step 2: Convert to fraction form
    193,420/266,920.56 = 112,903.36/x
  3. Step 3: Cross multiply
    193,420x = 266,920.56 × 112,903.36
  4. Step 4: Simplify right side
    193,420x = 30,136,228,077.08
  5. Step 5: Solve for x
    x = 30,136,228,077.08/193,420
  6. Step 6: Final answer
    x = 155,807.20

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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.