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Finding the Fourth Proportional to 260,012.70, 390,019.05 and 102,188.70

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Solution

The fourth proportional to 260,012.70, 390,019.05 and 102,188.70 is: 153,283.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,012.70 : 390,019.05 = 102,188.70 : x
  2. Step 2: Convert to fraction form
    260,012.70/390,019.05 = 102,188.70/x
  3. Step 3: Cross multiply
    260,012.70x = 390,019.05 × 102,188.70
  4. Step 4: Simplify right side
    260,012.70x = 39,855,539,694.74
  5. Step 5: Solve for x
    x = 39,855,539,694.74/260,012.70
  6. Step 6: Final answer
    x = 153,283.05

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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.