Home / 129,303.12-178,541.64-84,003.60

Finding the Fourth Proportional to 129,303.12, 178,541.64 and 84,003.60

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Solution

The fourth proportional to 129,303.12, 178,541.64 and 84,003.60 is: 115,992.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,303.12 : 178,541.64 = 84,003.60 : x
  2. Step 2: Convert to fraction form
    129,303.12/178,541.64 = 84,003.60/x
  3. Step 3: Cross multiply
    129,303.12x = 178,541.64 × 84,003.60
  4. Step 4: Simplify right side
    129,303.12x = 14,998,140,509.90
  5. Step 5: Solve for x
    x = 14,998,140,509.90/129,303.12
  6. Step 6: Final answer
    x = 115,992.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.