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Finding the Fourth Proportional to 126,859.42, 189,985.98 and 70,559.68

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Solution

The fourth proportional to 126,859.42, 189,985.98 and 70,559.68 is: 105,670.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,859.42 : 189,985.98 = 70,559.68 : x
  2. Step 2: Convert to fraction form
    126,859.42/189,985.98 = 70,559.68/x
  3. Step 3: Cross multiply
    126,859.42x = 189,985.98 × 70,559.68
  4. Step 4: Simplify right side
    126,859.42x = 13,405,349,953.29
  5. Step 5: Solve for x
    x = 13,405,349,953.29/126,859.42
  6. Step 6: Final answer
    x = 105,670.91

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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.