Home / 85,638.28-128,483.36-60,726.48

Finding the Fourth Proportional to 85,638.28, 128,483.36 and 60,726.48

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Solution

The fourth proportional to 85,638.28, 128,483.36 and 60,726.48 is: 91,108.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,638.28 : 128,483.36 = 60,726.48 : x
  2. Step 2: Convert to fraction form
    85,638.28/128,483.36 = 60,726.48/x
  3. Step 3: Cross multiply
    85,638.28x = 128,483.36 × 60,726.48
  4. Step 4: Simplify right side
    85,638.28x = 7,802,342,191.37
  5. Step 5: Solve for x
    x = 7,802,342,191.37/85,638.28
  6. Step 6: Final answer
    x = 91,108.11

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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.