Home / 85,981.10-128,983.80-26,810.60

Finding the Fourth Proportional to 85,981.10, 128,983.80 and 26,810.60

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Solution

The fourth proportional to 85,981.10, 128,983.80 and 26,810.60 is: 40,219.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,981.10 : 128,983.80 = 26,810.60 : x
  2. Step 2: Convert to fraction form
    85,981.10/128,983.80 = 26,810.60/x
  3. Step 3: Cross multiply
    85,981.10x = 128,983.80 × 26,810.60
  4. Step 4: Simplify right side
    85,981.10x = 3,458,133,068.28
  5. Step 5: Solve for x
    x = 3,458,133,068.28/85,981.10
  6. Step 6: Final answer
    x = 40,219.69

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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.