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Finding the Fourth Proportional to 78,108.30, 107,789.40 and 44,574.30

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Solution

The fourth proportional to 78,108.30, 107,789.40 and 44,574.30 is: 61,512.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,108.30 : 107,789.40 = 44,574.30 : x
  2. Step 2: Convert to fraction form
    78,108.30/107,789.40 = 44,574.30/x
  3. Step 3: Cross multiply
    78,108.30x = 107,789.40 × 44,574.30
  4. Step 4: Simplify right side
    78,108.30x = 4,804,637,052.42
  5. Step 5: Solve for x
    x = 4,804,637,052.42/78,108.30
  6. Step 6: Final answer
    x = 61,512.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.