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Finding the Fourth Proportional to 72,990.58, 100,664.10 and 47,487.64

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Solution

The fourth proportional to 72,990.58, 100,664.10 and 47,487.64 is: 65,492.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,990.58 : 100,664.10 = 47,487.64 : x
  2. Step 2: Convert to fraction form
    72,990.58/100,664.10 = 47,487.64/x
  3. Step 3: Cross multiply
    72,990.58x = 100,664.10 × 47,487.64
  4. Step 4: Simplify right side
    72,990.58x = 4,780,300,541.72
  5. Step 5: Solve for x
    x = 4,780,300,541.72/72,990.58
  6. Step 6: Final answer
    x = 65,492.02

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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.