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Finding the Fourth Proportional to 258,060.76, 356,111.70 and 143,346.80

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Solution

The fourth proportional to 258,060.76, 356,111.70 and 143,346.80 is: 197,811.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,060.76 : 356,111.70 = 143,346.80 : x
  2. Step 2: Convert to fraction form
    258,060.76/356,111.70 = 143,346.80/x
  3. Step 3: Cross multiply
    258,060.76x = 356,111.70 × 143,346.80
  4. Step 4: Simplify right side
    258,060.76x = 51,047,472,637.56
  5. Step 5: Solve for x
    x = 51,047,472,637.56/258,060.76
  6. Step 6: Final answer
    x = 197,811.84

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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.