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Finding the Fourth Proportional to 260,070.59, 390,122.88 and 80,133.95

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Solution

The fourth proportional to 260,070.59, 390,122.88 and 80,133.95 is: 120,206.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,070.59 : 390,122.88 = 80,133.95 : x
  2. Step 2: Convert to fraction form
    260,070.59/390,122.88 = 80,133.95/x
  3. Step 3: Cross multiply
    260,070.59x = 390,122.88 × 80,133.95
  4. Step 4: Simplify right side
    260,070.59x = 31,262,085,409.16
  5. Step 5: Solve for x
    x = 31,262,085,409.16/260,070.59
  6. Step 6: Final answer
    x = 120,206.16

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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.