Home / 85,514.10-128,307.60-53,948.40

Finding the Fourth Proportional to 85,514.10, 128,307.60 and 53,948.40

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Solution

The fourth proportional to 85,514.10, 128,307.60 and 53,948.40 is: 80,945.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,514.10 : 128,307.60 = 53,948.40 : x
  2. Step 2: Convert to fraction form
    85,514.10/128,307.60 = 53,948.40/x
  3. Step 3: Cross multiply
    85,514.10x = 128,307.60 × 53,948.40
  4. Step 4: Simplify right side
    85,514.10x = 6,921,989,727.84
  5. Step 5: Solve for x
    x = 6,921,989,727.84/85,514.10
  6. Step 6: Final answer
    x = 80,945.60

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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.