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Finding the Fourth Proportional to 104,987.40, 157,097.10 and 77,339.40

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Solution

The fourth proportional to 104,987.40, 157,097.10 and 77,339.40 is: 115,726.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,987.40 : 157,097.10 = 77,339.40 : x
  2. Step 2: Convert to fraction form
    104,987.40/157,097.10 = 77,339.40/x
  3. Step 3: Cross multiply
    104,987.40x = 157,097.10 × 77,339.40
  4. Step 4: Simplify right side
    104,987.40x = 12,149,795,455.74
  5. Step 5: Solve for x
    x = 12,149,795,455.74/104,987.40
  6. Step 6: Final answer
    x = 115,726.22

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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.