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Finding the Fourth Proportional to 261,085.60, 391,628.40 and 64,093.60

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Solution

The fourth proportional to 261,085.60, 391,628.40 and 64,093.60 is: 96,140.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,085.60 : 391,628.40 = 64,093.60 : x
  2. Step 2: Convert to fraction form
    261,085.60/391,628.40 = 64,093.60/x
  3. Step 3: Cross multiply
    261,085.60x = 391,628.40 × 64,093.60
  4. Step 4: Simplify right side
    261,085.60x = 25,100,874,018.24
  5. Step 5: Solve for x
    x = 25,100,874,018.24/261,085.60
  6. Step 6: Final answer
    x = 96,140.40

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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.