Home / 90,693.09-135,813.38-57,312.45

Finding the Fourth Proportional to 90,693.09, 135,813.38 and 57,312.45

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Solution

The fourth proportional to 90,693.09, 135,813.38 and 57,312.45 is: 85,825.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,693.09 : 135,813.38 = 57,312.45 : x
  2. Step 2: Convert to fraction form
    90,693.09/135,813.38 = 57,312.45/x
  3. Step 3: Cross multiply
    90,693.09x = 135,813.38 × 57,312.45
  4. Step 4: Simplify right side
    90,693.09x = 7,783,797,264.02
  5. Step 5: Solve for x
    x = 7,783,797,264.02/90,693.09
  6. Step 6: Final answer
    x = 85,825.69

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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.