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Finding the Fourth Proportional to 258,588.60, 387,882.84 and 81,111.12

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Solution

The fourth proportional to 258,588.60, 387,882.84 and 81,111.12 is: 121,666.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,588.60 : 387,882.84 = 81,111.12 : x
  2. Step 2: Convert to fraction form
    258,588.60/387,882.84 = 81,111.12/x
  3. Step 3: Cross multiply
    258,588.60x = 387,882.84 × 81,111.12
  4. Step 4: Simplify right side
    258,588.60x = 31,461,611,581.18
  5. Step 5: Solve for x
    x = 31,461,611,581.18/258,588.60
  6. Step 6: Final answer
    x = 121,666.66

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1.5x scale

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.