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Finding the Fourth Proportional to 260,039.80, 390,030.90 and 73,070.20

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Solution

The fourth proportional to 260,039.80, 390,030.90 and 73,070.20 is: 109,597.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,039.80 : 390,030.90 = 73,070.20 : x
  2. Step 2: Convert to fraction form
    260,039.80/390,030.90 = 73,070.20/x
  3. Step 3: Cross multiply
    260,039.80x = 390,030.90 × 73,070.20
  4. Step 4: Simplify right side
    260,039.80x = 28,499,635,869.18
  5. Step 5: Solve for x
    x = 28,499,635,869.18/260,039.80
  6. Step 6: Final answer
    x = 109,597.21

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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.