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Finding the Fourth Proportional to 103,307.64, 142,552.78 and 57,979.48

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Solution

The fourth proportional to 103,307.64, 142,552.78 and 57,979.48 is: 80,005.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,307.64 : 142,552.78 = 57,979.48 : x
  2. Step 2: Convert to fraction form
    103,307.64/142,552.78 = 57,979.48/x
  3. Step 3: Cross multiply
    103,307.64x = 142,552.78 × 57,979.48
  4. Step 4: Simplify right side
    103,307.64x = 8,265,136,056.95
  5. Step 5: Solve for x
    x = 8,265,136,056.95/103,307.64
  6. Step 6: Final answer
    x = 80,005.08

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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.