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Finding the Fourth Proportional to 85,878.10, 128,829.30 and 26,707.60

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Solution

The fourth proportional to 85,878.10, 128,829.30 and 26,707.60 is: 40,065.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,878.10 : 128,829.30 = 26,707.60 : x
  2. Step 2: Convert to fraction form
    85,878.10/128,829.30 = 26,707.60/x
  3. Step 3: Cross multiply
    85,878.10x = 128,829.30 × 26,707.60
  4. Step 4: Simplify right side
    85,878.10x = 3,440,721,412.68
  5. Step 5: Solve for x
    x = 3,440,721,412.68/85,878.10
  6. Step 6: Final answer
    x = 40,065.18

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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.