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Finding the Fourth Proportional to 53,999.60, 80,999.40 and 48,313.40

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Solution

The fourth proportional to 53,999.60, 80,999.40 and 48,313.40 is: 72,470.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,999.60 : 80,999.40 = 48,313.40 : x
  2. Step 2: Convert to fraction form
    53,999.60/80,999.40 = 48,313.40/x
  3. Step 3: Cross multiply
    53,999.60x = 80,999.40 × 48,313.40
  4. Step 4: Simplify right side
    53,999.60x = 3,913,356,411.96
  5. Step 5: Solve for x
    x = 3,913,356,411.96/53,999.60
  6. Step 6: Final answer
    x = 72,470.10

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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.