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Finding the Fourth Proportional to 85,410.65, 128,115.98 and 38,025.65

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Solution

The fourth proportional to 85,410.65, 128,115.98 and 38,025.65 is: 57,038.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,410.65 : 128,115.98 = 38,025.65 : x
  2. Step 2: Convert to fraction form
    85,410.65/128,115.98 = 38,025.65/x
  3. Step 3: Cross multiply
    85,410.65x = 128,115.98 × 38,025.65
  4. Step 4: Simplify right side
    85,410.65x = 4,871,693,224.76
  5. Step 5: Solve for x
    x = 4,871,693,224.76/85,410.65
  6. Step 6: Final answer
    x = 57,038.48

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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.