Home / 85,943.08-128,921.10-55,888.84

Finding the Fourth Proportional to 85,943.08, 128,921.10 and 55,888.84

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Solution

The fourth proportional to 85,943.08, 128,921.10 and 55,888.84 is: 83,837.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,943.08 : 128,921.10 = 55,888.84 : x
  2. Step 2: Convert to fraction form
    85,943.08/128,921.10 = 55,888.84/x
  3. Step 3: Cross multiply
    85,943.08x = 128,921.10 × 55,888.84
  4. Step 4: Simplify right side
    85,943.08x = 7,205,250,730.52
  5. Step 5: Solve for x
    x = 7,205,250,730.52/85,943.08
  6. Step 6: Final answer
    x = 83,837.47

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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.