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Finding the Fourth Proportional to 78,755.16, 118,133.17 and 19,590.83

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Solution

The fourth proportional to 78,755.16, 118,133.17 and 19,590.83 is: 29,386.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,755.16 : 118,133.17 = 19,590.83 : x
  2. Step 2: Convert to fraction form
    78,755.16/118,133.17 = 19,590.83/x
  3. Step 3: Cross multiply
    78,755.16x = 118,133.17 × 19,590.83
  4. Step 4: Simplify right side
    78,755.16x = 2,314,326,850.83
  5. Step 5: Solve for x
    x = 2,314,326,850.83/78,755.16
  6. Step 6: Final answer
    x = 29,386.35

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1.5x scale

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.