Home / 100,116.04-138,190.88-57,702.80

Finding the Fourth Proportional to 100,116.04, 138,190.88 and 57,702.80

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Solution

The fourth proportional to 100,116.04, 138,190.88 and 57,702.80 is: 79,647.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,116.04 : 138,190.88 = 57,702.80 : x
  2. Step 2: Convert to fraction form
    100,116.04/138,190.88 = 57,702.80/x
  3. Step 3: Cross multiply
    100,116.04x = 138,190.88 × 57,702.80
  4. Step 4: Simplify right side
    100,116.04x = 7,974,000,710.46
  5. Step 5: Solve for x
    x = 7,974,000,710.46/100,116.04
  6. Step 6: Final answer
    x = 79,647.58

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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.