Home / 90,782.70-136,040.40-65,875.20

Finding the Fourth Proportional to 90,782.70, 136,040.40 and 65,875.20

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Solution

The fourth proportional to 90,782.70, 136,040.40 and 65,875.20 is: 98,715.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,782.70 : 136,040.40 = 65,875.20 : x
  2. Step 2: Convert to fraction form
    90,782.70/136,040.40 = 65,875.20/x
  3. Step 3: Cross multiply
    90,782.70x = 136,040.40 × 65,875.20
  4. Step 4: Simplify right side
    90,782.70x = 8,961,688,558.08
  5. Step 5: Solve for x
    x = 8,961,688,558.08/90,782.70
  6. Step 6: Final answer
    x = 98,715.82

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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.