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Finding the Fourth Proportional to 253,068.72, 349,222.77 and 138,353.28

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Solution

The fourth proportional to 253,068.72, 349,222.77 and 138,353.28 is: 190,920.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,068.72 : 349,222.77 = 138,353.28 : x
  2. Step 2: Convert to fraction form
    253,068.72/349,222.77 = 138,353.28/x
  3. Step 3: Cross multiply
    253,068.72x = 349,222.77 × 138,353.28
  4. Step 4: Simplify right side
    253,068.72x = 48,316,115,680.19
  5. Step 5: Solve for x
    x = 48,316,115,680.19/253,068.72
  6. Step 6: Final answer
    x = 190,920.93

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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.