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Finding the Fourth Proportional to 78,695.40, 118,043.10 and 26,106.60

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Solution

The fourth proportional to 78,695.40, 118,043.10 and 26,106.60 is: 39,159.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,695.40 : 118,043.10 = 26,106.60 : x
  2. Step 2: Convert to fraction form
    78,695.40/118,043.10 = 26,106.60/x
  3. Step 3: Cross multiply
    78,695.40x = 118,043.10 × 26,106.60
  4. Step 4: Simplify right side
    78,695.40x = 3,081,703,994.46
  5. Step 5: Solve for x
    x = 3,081,703,994.46/78,695.40
  6. Step 6: Final answer
    x = 39,159.90

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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.