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Finding the Fourth Proportional to 255,399.78, 352,459.71 and 140,686.74

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Solution

The fourth proportional to 255,399.78, 352,459.71 and 140,686.74 is: 194,152.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,399.78 : 352,459.71 = 140,686.74 : x
  2. Step 2: Convert to fraction form
    255,399.78/352,459.71 = 140,686.74/x
  3. Step 3: Cross multiply
    255,399.78x = 352,459.71 × 140,686.74
  4. Step 4: Simplify right side
    255,399.78x = 49,586,407,581.25
  5. Step 5: Solve for x
    x = 49,586,407,581.25/255,399.78
  6. Step 6: Final answer
    x = 194,152.12

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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.