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Finding the Fourth Proportional to 85,510.64, 128,016.60 and 57,079.28

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Solution

The fourth proportional to 85,510.64, 128,016.60 and 57,079.28 is: 85,452.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,510.64 : 128,016.60 = 57,079.28 : x
  2. Step 2: Convert to fraction form
    85,510.64/128,016.60 = 57,079.28/x
  3. Step 3: Cross multiply
    85,510.64x = 128,016.60 × 57,079.28
  4. Step 4: Simplify right side
    85,510.64x = 7,307,095,356.05
  5. Step 5: Solve for x
    x = 7,307,095,356.05/85,510.64
  6. Step 6: Final answer
    x = 85,452.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.