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Finding the Fourth Proportional to 56,445.20, 78,919.60 and 56,445.20

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Solution

The fourth proportional to 56,445.20, 78,919.60 and 56,445.20 is: 78,919.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,445.20 : 78,919.60 = 56,445.20 : x
  2. Step 2: Convert to fraction form
    56,445.20/78,919.60 = 56,445.20/x
  3. Step 3: Cross multiply
    56,445.20x = 78,919.60 × 56,445.20
  4. Step 4: Simplify right side
    56,445.20x = 4,454,632,605.92
  5. Step 5: Solve for x
    x = 4,454,632,605.92/56,445.20
  6. Step 6: Final answer
    x = 78,919.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.