Home / 105,171.16-145,136.76-57,425.68

Finding the Fourth Proportional to 105,171.16, 145,136.76 and 57,425.68

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Solution

The fourth proportional to 105,171.16, 145,136.76 and 57,425.68 is: 79,247.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,171.16 : 145,136.76 = 57,425.68 : x
  2. Step 2: Convert to fraction form
    105,171.16/145,136.76 = 57,425.68/x
  3. Step 3: Cross multiply
    105,171.16x = 145,136.76 × 57,425.68
  4. Step 4: Simplify right side
    105,171.16x = 8,334,577,136.00
  5. Step 5: Solve for x
    x = 8,334,577,136.00/105,171.16
  6. Step 6: Final answer
    x = 79,247.74

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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.