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Finding the Fourth Proportional to 56,009.20, 84,013.80 and 54,108.40

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Solution

The fourth proportional to 56,009.20, 84,013.80 and 54,108.40 is: 81,162.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,009.20 : 84,013.80 = 54,108.40 : x
  2. Step 2: Convert to fraction form
    56,009.20/84,013.80 = 54,108.40/x
  3. Step 3: Cross multiply
    56,009.20x = 84,013.80 × 54,108.40
  4. Step 4: Simplify right side
    56,009.20x = 4,545,852,295.92
  5. Step 5: Solve for x
    x = 4,545,852,295.92/56,009.20
  6. Step 6: Final answer
    x = 81,162.60

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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.