Home / 85,636.40-128,479.28-35,690.72

Finding the Fourth Proportional to 85,636.40, 128,479.28 and 35,690.72

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Solution

The fourth proportional to 85,636.40, 128,479.28 and 35,690.72 is: 53,546.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,636.40 : 128,479.28 = 35,690.72 : x
  2. Step 2: Convert to fraction form
    85,636.40/128,479.28 = 35,690.72/x
  3. Step 3: Cross multiply
    85,636.40x = 128,479.28 × 35,690.72
  4. Step 4: Simplify right side
    85,636.40x = 4,585,518,008.28
  5. Step 5: Solve for x
    x = 4,585,518,008.28/85,636.40
  6. Step 6: Final answer
    x = 53,546.37

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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.