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Finding the Fourth Proportional to 104,929.60, 157,701.60 and 91,412.80

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Solution

The fourth proportional to 104,929.60, 157,701.60 and 91,412.80 is: 137,386.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,929.60 : 157,701.60 = 91,412.80 : x
  2. Step 2: Convert to fraction form
    104,929.60/157,701.60 = 91,412.80/x
  3. Step 3: Cross multiply
    104,929.60x = 157,701.60 × 91,412.80
  4. Step 4: Simplify right side
    104,929.60x = 14,415,944,820.48
  5. Step 5: Solve for x
    x = 14,415,944,820.48/104,929.60
  6. Step 6: Final answer
    x = 137,386.83

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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.