Home / 128,107.07-176,861.53-85,144.81

Finding the Fourth Proportional to 128,107.07, 176,861.53 and 85,144.81

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Solution

The fourth proportional to 128,107.07, 176,861.53 and 85,144.81 is: 117,548.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,107.07 : 176,861.53 = 85,144.81 : x
  2. Step 2: Convert to fraction form
    128,107.07/176,861.53 = 85,144.81/x
  3. Step 3: Cross multiply
    128,107.07x = 176,861.53 × 85,144.81
  4. Step 4: Simplify right side
    128,107.07x = 15,058,841,368.16
  5. Step 5: Solve for x
    x = 15,058,841,368.16/128,107.07
  6. Step 6: Final answer
    x = 117,548.87

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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.