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Finding the Fourth Proportional to 72,495.64, 108,623.40 and 51,331.18

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Solution

The fourth proportional to 72,495.64, 108,623.40 and 51,331.18 is: 76,911.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,495.64 : 108,623.40 = 51,331.18 : x
  2. Step 2: Convert to fraction form
    72,495.64/108,623.40 = 51,331.18/x
  3. Step 3: Cross multiply
    72,495.64x = 108,623.40 × 51,331.18
  4. Step 4: Simplify right side
    72,495.64x = 5,575,767,297.61
  5. Step 5: Solve for x
    x = 5,575,767,297.61/72,495.64
  6. Step 6: Final answer
    x = 76,911.76

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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.