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Finding the Fourth Proportional to 72,492.48, 108,656.76 and 39,138.24

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Solution

The fourth proportional to 72,492.48, 108,656.76 and 39,138.24 is: 58,663.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,492.48 : 108,656.76 = 39,138.24 : x
  2. Step 2: Convert to fraction form
    72,492.48/108,656.76 = 39,138.24/x
  3. Step 3: Cross multiply
    72,492.48x = 108,656.76 × 39,138.24
  4. Step 4: Simplify right side
    72,492.48x = 4,252,634,350.50
  5. Step 5: Solve for x
    x = 4,252,634,350.50/72,492.48
  6. Step 6: Final answer
    x = 58,663.11

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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.