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Finding the Fourth Proportional to 56,386.80, 84,580.20 and 40,640.40

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Solution

The fourth proportional to 56,386.80, 84,580.20 and 40,640.40 is: 60,960.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,386.80 : 84,580.20 = 40,640.40 : x
  2. Step 2: Convert to fraction form
    56,386.80/84,580.20 = 40,640.40/x
  3. Step 3: Cross multiply
    56,386.80x = 84,580.20 × 40,640.40
  4. Step 4: Simplify right side
    56,386.80x = 3,437,373,160.08
  5. Step 5: Solve for x
    x = 3,437,373,160.08/56,386.80
  6. Step 6: Final answer
    x = 60,960.60

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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.