Home / 105,163.90-145,132.08-57,421.68

Finding the Fourth Proportional to 105,163.90, 145,132.08 and 57,421.68

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Solution

The fourth proportional to 105,163.90, 145,132.08 and 57,421.68 is: 79,245.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,163.90 : 145,132.08 = 57,421.68 : x
  2. Step 2: Convert to fraction form
    105,163.90/145,132.08 = 57,421.68/x
  3. Step 3: Cross multiply
    105,163.90x = 145,132.08 × 57,421.68
  4. Step 4: Simplify right side
    105,163.90x = 8,333,727,855.49
  5. Step 5: Solve for x
    x = 8,333,727,855.49/105,163.90
  6. Step 6: Final answer
    x = 79,245.14

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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.