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Finding the Fourth Proportional to 72,263.77, 99,728.90 and 40,435.63

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Solution

The fourth proportional to 72,263.77, 99,728.90 and 40,435.63 is: 55,803.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,263.77 : 99,728.90 = 40,435.63 : x
  2. Step 2: Convert to fraction form
    72,263.77/99,728.90 = 40,435.63/x
  3. Step 3: Cross multiply
    72,263.77x = 99,728.90 × 40,435.63
  4. Step 4: Simplify right side
    72,263.77x = 4,032,600,900.71
  5. Step 5: Solve for x
    x = 4,032,600,900.71/72,263.77
  6. Step 6: Final answer
    x = 55,803.91

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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.