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Finding the Fourth Proportional to 85,792.80, 128,546.90 and 60,708.48

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Solution

The fourth proportional to 85,792.80, 128,546.90 and 60,708.48 is: 90,962.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,792.80 : 128,546.90 = 60,708.48 : x
  2. Step 2: Convert to fraction form
    85,792.80/128,546.90 = 60,708.48/x
  3. Step 3: Cross multiply
    85,792.80x = 128,546.90 × 60,708.48
  4. Step 4: Simplify right side
    85,792.80x = 7,803,886,907.71
  5. Step 5: Solve for x
    x = 7,803,886,907.71/85,792.80
  6. Step 6: Final answer
    x = 90,962.03

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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.