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Finding the Fourth Proportional to 79,124.40, 109,242.63 and 70,611.93

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Solution

The fourth proportional to 79,124.40, 109,242.63 and 70,611.93 is: 97,489.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,124.40 : 109,242.63 = 70,611.93 : x
  2. Step 2: Convert to fraction form
    79,124.40/109,242.63 = 70,611.93/x
  3. Step 3: Cross multiply
    79,124.40x = 109,242.63 × 70,611.93
  4. Step 4: Simplify right side
    79,124.40x = 7,713,832,942.58
  5. Step 5: Solve for x
    x = 7,713,832,942.58/79,124.40
  6. Step 6: Final answer
    x = 97,489.94

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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.