Home / 109,515.12-151,130.66-61,768.32

Finding the Fourth Proportional to 109,515.12, 151,130.66 and 61,768.32

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Solution

The fourth proportional to 109,515.12, 151,130.66 and 61,768.32 is: 85,240.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,515.12 : 151,130.66 = 61,768.32 : x
  2. Step 2: Convert to fraction form
    109,515.12/151,130.66 = 61,768.32/x
  3. Step 3: Cross multiply
    109,515.12x = 151,130.66 × 61,768.32
  4. Step 4: Simplify right side
    109,515.12x = 9,335,086,968.69
  5. Step 5: Solve for x
    x = 9,335,086,968.69/109,515.12
  6. Step 6: Final answer
    x = 85,240.17

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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.