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Finding the Fourth Proportional to 72,323.84, 108,402.56 and 45,318.40

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Solution

The fourth proportional to 72,323.84, 108,402.56 and 45,318.40 is: 67,925.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,323.84 : 108,402.56 = 45,318.40 : x
  2. Step 2: Convert to fraction form
    72,323.84/108,402.56 = 45,318.40/x
  3. Step 3: Cross multiply
    72,323.84x = 108,402.56 × 45,318.40
  4. Step 4: Simplify right side
    72,323.84x = 4,912,630,575.10
  5. Step 5: Solve for x
    x = 4,912,630,575.10/72,323.84
  6. Step 6: Final answer
    x = 67,925.47

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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.