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Finding the Fourth Proportional to 85,840.15, 128,814.90 and 50,301.40

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Solution

The fourth proportional to 85,840.15, 128,814.90 and 50,301.40 is: 75,484.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,840.15 : 128,814.90 = 50,301.40 : x
  2. Step 2: Convert to fraction form
    85,840.15/128,814.90 = 50,301.40/x
  3. Step 3: Cross multiply
    85,840.15x = 128,814.90 × 50,301.40
  4. Step 4: Simplify right side
    85,840.15x = 6,479,569,810.86
  5. Step 5: Solve for x
    x = 6,479,569,810.86/85,840.15
  6. Step 6: Final answer
    x = 75,484.14

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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.