Home / 85,947.78-128,921.16-46,753.98

Finding the Fourth Proportional to 85,947.78, 128,921.16 and 46,753.98

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Solution

The fourth proportional to 85,947.78, 128,921.16 and 46,753.98 is: 70,130.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,947.78 : 128,921.16 = 46,753.98 : x
  2. Step 2: Convert to fraction form
    85,947.78/128,921.16 = 46,753.98/x
  3. Step 3: Cross multiply
    85,947.78x = 128,921.16 × 46,753.98
  4. Step 4: Simplify right side
    85,947.78x = 6,027,577,336.22
  5. Step 5: Solve for x
    x = 6,027,577,336.22/85,947.78
  6. Step 6: Final answer
    x = 70,130.69

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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.