Home / 105,425.75-145,485.02-57,679.49

Finding the Fourth Proportional to 105,425.75, 145,485.02 and 57,679.49

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Solution

The fourth proportional to 105,425.75, 145,485.02 and 57,679.49 is: 79,596.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,425.75 : 145,485.02 = 57,679.49 : x
  2. Step 2: Convert to fraction form
    105,425.75/145,485.02 = 57,679.49/x
  3. Step 3: Cross multiply
    105,425.75x = 145,485.02 × 57,679.49
  4. Step 4: Simplify right side
    105,425.75x = 8,391,500,740.42
  5. Step 5: Solve for x
    x = 8,391,500,740.42/105,425.75
  6. Step 6: Final answer
    x = 79,596.31

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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.