Home / 90,631.80-135,972.18-64,502.40

Finding the Fourth Proportional to 90,631.80, 135,972.18 and 64,502.40

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Solution

The fourth proportional to 90,631.80, 135,972.18 and 64,502.40 is: 96,771.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,631.80 : 135,972.18 = 64,502.40 : x
  2. Step 2: Convert to fraction form
    90,631.80/135,972.18 = 64,502.40/x
  3. Step 3: Cross multiply
    90,631.80x = 135,972.18 × 64,502.40
  4. Step 4: Simplify right side
    90,631.80x = 8,770,531,943.23
  5. Step 5: Solve for x
    x = 8,770,531,943.23/90,631.80
  6. Step 6: Final answer
    x = 96,771.02

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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.