Home / 85,828.32-128,690.28-38,434.68

Finding the Fourth Proportional to 85,828.32, 128,690.28 and 38,434.68

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Solution

The fourth proportional to 85,828.32, 128,690.28 and 38,434.68 is: 57,628.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,828.32 : 128,690.28 = 38,434.68 : x
  2. Step 2: Convert to fraction form
    85,828.32/128,690.28 = 38,434.68/x
  3. Step 3: Cross multiply
    85,828.32x = 128,690.28 × 38,434.68
  4. Step 4: Simplify right side
    85,828.32x = 4,946,169,730.91
  5. Step 5: Solve for x
    x = 4,946,169,730.91/85,828.32
  6. Step 6: Final answer
    x = 57,628.64

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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.