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Finding the Fourth Proportional to 92,003.60, 128,980 and 92,003.60

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Solution

The fourth proportional to 92,003.60, 128,980 and 92,003.60 is: 128,980.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,003.60 : 128,980 = 92,003.60 : x
  2. Step 2: Convert to fraction form
    92,003.60/128,980 = 92,003.60/x
  3. Step 3: Cross multiply
    92,003.60x = 128,980 × 92,003.60
  4. Step 4: Simplify right side
    92,003.60x = 11,866,624,328
  5. Step 5: Solve for x
    x = 11,866,624,328/92,003.60
  6. Step 6: Final answer
    x = 128,980.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.