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Finding the Fourth Proportional to 252,978.58, 349,117.66 and 138,263.60

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Solution

The fourth proportional to 252,978.58, 349,117.66 and 138,263.60 is: 190,807.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,978.58 : 349,117.66 = 138,263.60 : x
  2. Step 2: Convert to fraction form
    252,978.58/349,117.66 = 138,263.60/x
  3. Step 3: Cross multiply
    252,978.58x = 349,117.66 × 138,263.60
  4. Step 4: Simplify right side
    252,978.58x = 48,270,264,495.18
  5. Step 5: Solve for x
    x = 48,270,264,495.18/252,978.58
  6. Step 6: Final answer
    x = 190,807.71

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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.