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Finding the Fourth Proportional to 78,307.70, 108,063.72 and 42,497.73

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Solution

The fourth proportional to 78,307.70, 108,063.72 and 42,497.73 is: 58,646.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,307.70 : 108,063.72 = 42,497.73 : x
  2. Step 2: Convert to fraction form
    78,307.70/108,063.72 = 42,497.73/x
  3. Step 3: Cross multiply
    78,307.70x = 108,063.72 × 42,497.73
  4. Step 4: Simplify right side
    78,307.70x = 4,592,462,795.36
  5. Step 5: Solve for x
    x = 4,592,462,795.36/78,307.70
  6. Step 6: Final answer
    x = 58,646.38

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1.5x scale

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.