Home / 85,664.40-128,496.60-76,916.40

Finding the Fourth Proportional to 85,664.40, 128,496.60 and 76,916.40

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Solution

The fourth proportional to 85,664.40, 128,496.60 and 76,916.40 is: 115,374.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,664.40 : 128,496.60 = 76,916.40 : x
  2. Step 2: Convert to fraction form
    85,664.40/128,496.60 = 76,916.40/x
  3. Step 3: Cross multiply
    85,664.40x = 128,496.60 × 76,916.40
  4. Step 4: Simplify right side
    85,664.40x = 9,883,495,884.24
  5. Step 5: Solve for x
    x = 9,883,495,884.24/85,664.40
  6. Step 6: Final answer
    x = 115,374.60

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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.