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Finding the Fourth Proportional to 82,929.60, 124,701.60 and 69,412.80

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Solution

The fourth proportional to 82,929.60, 124,701.60 and 69,412.80 is: 104,376.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,929.60 : 124,701.60 = 69,412.80 : x
  2. Step 2: Convert to fraction form
    82,929.60/124,701.60 = 69,412.80/x
  3. Step 3: Cross multiply
    82,929.60x = 124,701.60 × 69,412.80
  4. Step 4: Simplify right side
    82,929.60x = 8,655,887,220.48
  5. Step 5: Solve for x
    x = 8,655,887,220.48/82,929.60
  6. Step 6: Final answer
    x = 104,376.33

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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.