Home / 137,121.12-189,224.64-77,505.12

Finding the Fourth Proportional to 137,121.12, 189,224.64 and 77,505.12

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Solution

The fourth proportional to 137,121.12, 189,224.64 and 77,505.12 is: 106,955.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,121.12 : 189,224.64 = 77,505.12 : x
  2. Step 2: Convert to fraction form
    137,121.12/189,224.64 = 77,505.12/x
  3. Step 3: Cross multiply
    137,121.12x = 189,224.64 × 77,505.12
  4. Step 4: Simplify right side
    137,121.12x = 14,665,878,430.16
  5. Step 5: Solve for x
    x = 14,665,878,430.16/137,121.12
  6. Step 6: Final answer
    x = 106,955.65

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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.