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Finding the Fourth Proportional to 260,053.80, 390,080.70 and 73,065.30

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Solution

The fourth proportional to 260,053.80, 390,080.70 and 73,065.30 is: 109,597.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,053.80 : 390,080.70 = 73,065.30 : x
  2. Step 2: Convert to fraction form
    260,053.80/390,080.70 = 73,065.30/x
  3. Step 3: Cross multiply
    260,053.80x = 390,080.70 × 73,065.30
  4. Step 4: Simplify right side
    260,053.80x = 28,501,363,369.71
  5. Step 5: Solve for x
    x = 28,501,363,369.71/260,053.80
  6. Step 6: Final answer
    x = 109,597.95

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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.