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Finding the Fourth Proportional to 260,037.10, 390,068.45 and 135,621.10

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Solution

The fourth proportional to 260,037.10, 390,068.45 and 135,621.10 is: 203,438.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,037.10 : 390,068.45 = 135,621.10 : x
  2. Step 2: Convert to fraction form
    260,037.10/390,068.45 = 135,621.10/x
  3. Step 3: Cross multiply
    260,037.10x = 390,068.45 × 135,621.10
  4. Step 4: Simplify right side
    260,037.10x = 52,901,512,264.30
  5. Step 5: Solve for x
    x = 52,901,512,264.30/260,037.10
  6. Step 6: Final answer
    x = 203,438.33

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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.