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Finding the Fourth Proportional to 260,039.30, 390,030.15 and 73,069.70

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Solution

The fourth proportional to 260,039.30, 390,030.15 and 73,069.70 is: 109,596.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,039.30 : 390,030.15 = 73,069.70 : x
  2. Step 2: Convert to fraction form
    260,039.30/390,030.15 = 73,069.70/x
  3. Step 3: Cross multiply
    260,039.30x = 390,030.15 × 73,069.70
  4. Step 4: Simplify right side
    260,039.30x = 28,499,386,051.46
  5. Step 5: Solve for x
    x = 28,499,386,051.46/260,039.30
  6. Step 6: Final answer
    x = 109,596.46

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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.