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Finding the Fourth Proportional to 130,807.06, 195,868.04 and 85,686.48

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Solution

The fourth proportional to 130,807.06, 195,868.04 and 85,686.48 is: 128,305.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,807.06 : 195,868.04 = 85,686.48 : x
  2. Step 2: Convert to fraction form
    130,807.06/195,868.04 = 85,686.48/x
  3. Step 3: Cross multiply
    130,807.06x = 195,868.04 × 85,686.48
  4. Step 4: Simplify right side
    130,807.06x = 16,783,242,892.10
  5. Step 5: Solve for x
    x = 16,783,242,892.10/130,807.06
  6. Step 6: Final answer
    x = 128,305.33

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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.