Home / 123,155.07-169,955.89-72,155.60

Finding the Fourth Proportional to 123,155.07, 169,955.89 and 72,155.60

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Solution

The fourth proportional to 123,155.07, 169,955.89 and 72,155.60 is: 99,575.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,155.07 : 169,955.89 = 72,155.60 : x
  2. Step 2: Convert to fraction form
    123,155.07/169,955.89 = 72,155.60/x
  3. Step 3: Cross multiply
    123,155.07x = 169,955.89 × 72,155.60
  4. Step 4: Simplify right side
    123,155.07x = 12,263,268,855.71
  5. Step 5: Solve for x
    x = 12,263,268,855.71/123,155.07
  6. Step 6: Final answer
    x = 99,575.83

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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.