Home / 123,154.07-169,954.50-72,154.60

Finding the Fourth Proportional to 123,154.07, 169,954.50 and 72,154.60

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Solution

The fourth proportional to 123,154.07, 169,954.50 and 72,154.60 is: 99,574.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,154.07 : 169,954.50 = 72,154.60 : x
  2. Step 2: Convert to fraction form
    123,154.07/169,954.50 = 72,154.60/x
  3. Step 3: Cross multiply
    123,154.07x = 169,954.50 × 72,154.60
  4. Step 4: Simplify right side
    123,154.07x = 12,262,998,811.39
  5. Step 5: Solve for x
    x = 12,262,998,811.39/123,154.07
  6. Step 6: Final answer
    x = 99,574.45

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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.