Home / 85,943.58-128,921.85-55,889.34

Finding the Fourth Proportional to 85,943.58, 128,921.85 and 55,889.34

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Solution

The fourth proportional to 85,943.58, 128,921.85 and 55,889.34 is: 83,838.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,943.58 : 128,921.85 = 55,889.34 : x
  2. Step 2: Convert to fraction form
    85,943.58/128,921.85 = 55,889.34/x
  3. Step 3: Cross multiply
    85,943.58x = 128,921.85 × 55,889.34
  4. Step 4: Simplify right side
    85,943.58x = 7,205,357,108.08
  5. Step 5: Solve for x
    x = 7,205,357,108.08/85,943.58
  6. Step 6: Final answer
    x = 83,838.22

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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.