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Finding the Fourth Proportional to 72,695.93, 109,022.76 and 28,312.79

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Solution

The fourth proportional to 72,695.93, 109,022.76 and 28,312.79 is: 42,460.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,695.93 : 109,022.76 = 28,312.79 : x
  2. Step 2: Convert to fraction form
    72,695.93/109,022.76 = 28,312.79/x
  3. Step 3: Cross multiply
    72,695.93x = 109,022.76 × 28,312.79
  4. Step 4: Simplify right side
    72,695.93x = 3,086,737,963.99
  5. Step 5: Solve for x
    x = 3,086,737,963.99/72,695.93
  6. Step 6: Final answer
    x = 42,460.95

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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.