Home / 118,106.49-162,990.03-72,814.40

Finding the Fourth Proportional to 118,106.49, 162,990.03 and 72,814.40

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Solution

The fourth proportional to 118,106.49, 162,990.03 and 72,814.40 is: 100,485.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,106.49 : 162,990.03 = 72,814.40 : x
  2. Step 2: Convert to fraction form
    118,106.49/162,990.03 = 72,814.40/x
  3. Step 3: Cross multiply
    118,106.49x = 162,990.03 × 72,814.40
  4. Step 4: Simplify right side
    118,106.49x = 11,868,020,425.48
  5. Step 5: Solve for x
    x = 11,868,020,425.48/118,106.49
  6. Step 6: Final answer
    x = 100,485.76

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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.