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Finding the Fourth Proportional to 78,730.88, 118,033.95 and 39,267.68

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Solution

The fourth proportional to 78,730.88, 118,033.95 and 39,267.68 is: 58,870.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,730.88 : 118,033.95 = 39,267.68 : x
  2. Step 2: Convert to fraction form
    78,730.88/118,033.95 = 39,267.68/x
  3. Step 3: Cross multiply
    78,730.88x = 118,033.95 × 39,267.68
  4. Step 4: Simplify right side
    78,730.88x = 4,634,919,377.74
  5. Step 5: Solve for x
    x = 4,634,919,377.74/78,730.88
  6. Step 6: Final answer
    x = 58,870.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.