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Finding the Fourth Proportional to 124,878.92, 172,469.94 and 84,780.68

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Solution

The fourth proportional to 124,878.92, 172,469.94 and 84,780.68 is: 117,090.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,878.92 : 172,469.94 = 84,780.68 : x
  2. Step 2: Convert to fraction form
    124,878.92/172,469.94 = 84,780.68/x
  3. Step 3: Cross multiply
    124,878.92x = 172,469.94 × 84,780.68
  4. Step 4: Simplify right side
    124,878.92x = 14,622,118,792.76
  5. Step 5: Solve for x
    x = 14,622,118,792.76/124,878.92
  6. Step 6: Final answer
    x = 117,090.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.