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Finding the Fourth Proportional to 85,509.77, 128,292.32 and 41,130.74

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Solution

The fourth proportional to 85,509.77, 128,292.32 and 41,130.74 is: 61,709.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,509.77 : 128,292.32 = 41,130.74 : x
  2. Step 2: Convert to fraction form
    85,509.77/128,292.32 = 41,130.74/x
  3. Step 3: Cross multiply
    85,509.77x = 128,292.32 × 41,130.74
  4. Step 4: Simplify right side
    85,509.77x = 5,276,757,210.80
  5. Step 5: Solve for x
    x = 5,276,757,210.80/85,509.77
  6. Step 6: Final answer
    x = 61,709.41

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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.