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Finding the Fourth Proportional to 142,999.98, 197,331.39 and 79,333.98

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Solution

The fourth proportional to 142,999.98, 197,331.39 and 79,333.98 is: 109,476.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,999.98 : 197,331.39 = 79,333.98 : x
  2. Step 2: Convert to fraction form
    142,999.98/197,331.39 = 79,333.98/x
  3. Step 3: Cross multiply
    142,999.98x = 197,331.39 × 79,333.98
  4. Step 4: Simplify right side
    142,999.98x = 15,655,084,547.63
  5. Step 5: Solve for x
    x = 15,655,084,547.63/142,999.98
  6. Step 6: Final answer
    x = 109,476.13

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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.