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Finding the Fourth Proportional to 70,859.63, 97,777.77 and 40,643.39

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Solution

The fourth proportional to 70,859.63, 97,777.77 and 40,643.39 is: 56,082.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,859.63 : 97,777.77 = 40,643.39 : x
  2. Step 2: Convert to fraction form
    70,859.63/97,777.77 = 40,643.39/x
  3. Step 3: Cross multiply
    70,859.63x = 97,777.77 × 40,643.39
  4. Step 4: Simplify right side
    70,859.63x = 3,974,019,550.55
  5. Step 5: Solve for x
    x = 3,974,019,550.55/70,859.63
  6. Step 6: Final answer
    x = 56,082.99

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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.