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Finding the Fourth Proportional to 61,152.60, 91,728.90 and 56,341.20

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Solution

The fourth proportional to 61,152.60, 91,728.90 and 56,341.20 is: 84,511.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,152.60 : 91,728.90 = 56,341.20 : x
  2. Step 2: Convert to fraction form
    61,152.60/91,728.90 = 56,341.20/x
  3. Step 3: Cross multiply
    61,152.60x = 91,728.90 × 56,341.20
  4. Step 4: Simplify right side
    61,152.60x = 5,168,116,300.68
  5. Step 5: Solve for x
    x = 5,168,116,300.68/61,152.60
  6. Step 6: Final answer
    x = 84,511.80

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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.