Home / 90,489.48-135,684.88-31,320.24

Finding the Fourth Proportional to 90,489.48, 135,684.88 and 31,320.24

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Solution

The fourth proportional to 90,489.48, 135,684.88 and 31,320.24 is: 46,963.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,489.48 : 135,684.88 = 31,320.24 : x
  2. Step 2: Convert to fraction form
    90,489.48/135,684.88 = 31,320.24/x
  3. Step 3: Cross multiply
    90,489.48x = 135,684.88 × 31,320.24
  4. Step 4: Simplify right side
    90,489.48x = 4,249,683,005.97
  5. Step 5: Solve for x
    x = 4,249,683,005.97/90,489.48
  6. Step 6: Final answer
    x = 46,963.28

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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.