Home / 105,087.96-145,021.80-57,342.30

Finding the Fourth Proportional to 105,087.96, 145,021.80 and 57,342.30

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Solution

The fourth proportional to 105,087.96, 145,021.80 and 57,342.30 is: 79,132.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,087.96 : 145,021.80 = 57,342.30 : x
  2. Step 2: Convert to fraction form
    105,087.96/145,021.80 = 57,342.30/x
  3. Step 3: Cross multiply
    105,087.96x = 145,021.80 × 57,342.30
  4. Step 4: Simplify right side
    105,087.96x = 8,315,883,562.14
  5. Step 5: Solve for x
    x = 8,315,883,562.14/105,087.96
  6. Step 6: Final answer
    x = 79,132.60

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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.