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Finding the Fourth Proportional to 85,509.60, 128,292.06 and 41,130.54

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Solution

The fourth proportional to 85,509.60, 128,292.06 and 41,130.54 is: 61,709.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,509.60 : 128,292.06 = 41,130.54 : x
  2. Step 2: Convert to fraction form
    85,509.60/128,292.06 = 41,130.54/x
  3. Step 3: Cross multiply
    85,509.60x = 128,292.06 × 41,130.54
  4. Step 4: Simplify right side
    85,509.60x = 5,276,721,705.51
  5. Step 5: Solve for x
    x = 5,276,721,705.51/85,509.60
  6. Step 6: Final answer
    x = 61,709.11

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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.