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Finding the Fourth Proportional to 78,315.12, 118,051.14 and 73,743.08

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Solution

The fourth proportional to 78,315.12, 118,051.14 and 73,743.08 is: 111,159.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,315.12 : 118,051.14 = 73,743.08 : x
  2. Step 2: Convert to fraction form
    78,315.12/118,051.14 = 73,743.08/x
  3. Step 3: Cross multiply
    78,315.12x = 118,051.14 × 73,743.08
  4. Step 4: Simplify right side
    78,315.12x = 8,705,453,932.59
  5. Step 5: Solve for x
    x = 8,705,453,932.59/78,315.12
  6. Step 6: Final answer
    x = 111,159.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.