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Finding the Fourth Proportional to 72,175.86, 99,600.93 and 40,348.50

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Solution

The fourth proportional to 72,175.86, 99,600.93 and 40,348.50 is: 55,679.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,175.86 : 99,600.93 = 40,348.50 : x
  2. Step 2: Convert to fraction form
    72,175.86/99,600.93 = 40,348.50/x
  3. Step 3: Cross multiply
    72,175.86x = 99,600.93 × 40,348.50
  4. Step 4: Simplify right side
    72,175.86x = 4,018,748,124.11
  5. Step 5: Solve for x
    x = 4,018,748,124.11/72,175.86
  6. Step 6: Final answer
    x = 55,679.95

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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.