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Finding the Fourth Proportional to 208,691.90, 287,994.80 and 118,045.91

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Solution

The fourth proportional to 208,691.90, 287,994.80 and 118,045.91 is: 162,903.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,691.90 : 287,994.80 = 118,045.91 : x
  2. Step 2: Convert to fraction form
    208,691.90/287,994.80 = 118,045.91/x
  3. Step 3: Cross multiply
    208,691.90x = 287,994.80 × 118,045.91
  4. Step 4: Simplify right side
    208,691.90x = 33,996,607,651.04
  5. Step 5: Solve for x
    x = 33,996,607,651.04/208,691.90
  6. Step 6: Final answer
    x = 162,903.34

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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.