Home / 85,390.16-128,100.29-29,217.06

Finding the Fourth Proportional to 85,390.16, 128,100.29 and 29,217.06

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Solution

The fourth proportional to 85,390.16, 128,100.29 and 29,217.06 is: 43,830.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,390.16 : 128,100.29 = 29,217.06 : x
  2. Step 2: Convert to fraction form
    85,390.16/128,100.29 = 29,217.06/x
  3. Step 3: Cross multiply
    85,390.16x = 128,100.29 × 29,217.06
  4. Step 4: Simplify right side
    85,390.16x = 3,742,713,712.86
  5. Step 5: Solve for x
    x = 3,742,713,712.86/85,390.16
  6. Step 6: Final answer
    x = 43,830.74

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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.