Home / 85,615.30-128,250.15-48,636.10

Finding the Fourth Proportional to 85,615.30, 128,250.15 and 48,636.10

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Solution

The fourth proportional to 85,615.30, 128,250.15 and 48,636.10 is: 72,855.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,615.30 : 128,250.15 = 48,636.10 : x
  2. Step 2: Convert to fraction form
    85,615.30/128,250.15 = 48,636.10/x
  3. Step 3: Cross multiply
    85,615.30x = 128,250.15 × 48,636.10
  4. Step 4: Simplify right side
    85,615.30x = 6,237,587,120.42
  5. Step 5: Solve for x
    x = 6,237,587,120.42/85,615.30
  6. Step 6: Final answer
    x = 72,855.99

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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.