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Finding the Fourth Proportional to 105,243.58, 145,228.49 and 57,486.78

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Solution

The fourth proportional to 105,243.58, 145,228.49 and 57,486.78 is: 79,327.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,243.58 : 145,228.49 = 57,486.78 : x
  2. Step 2: Convert to fraction form
    105,243.58/145,228.49 = 57,486.78/x
  3. Step 3: Cross multiply
    105,243.58x = 145,228.49 × 57,486.78
  4. Step 4: Simplify right side
    105,243.58x = 8,348,718,254.36
  5. Step 5: Solve for x
    x = 8,348,718,254.36/105,243.58
  6. Step 6: Final answer
    x = 79,327.58

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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.