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Finding the Fourth Proportional to 260,123.80, 390,185.70 and 73,135.30

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Solution

The fourth proportional to 260,123.80, 390,185.70 and 73,135.30 is: 109,702.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,123.80 : 390,185.70 = 73,135.30 : x
  2. Step 2: Convert to fraction form
    260,123.80/390,185.70 = 73,135.30/x
  3. Step 3: Cross multiply
    260,123.80x = 390,185.70 × 73,135.30
  4. Step 4: Simplify right side
    260,123.80x = 28,536,348,225.21
  5. Step 5: Solve for x
    x = 28,536,348,225.21/260,123.80
  6. Step 6: Final answer
    x = 109,702.95

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1.5x scale

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.