Home / 128,795.57-177,583.42-83,457.01

Finding the Fourth Proportional to 128,795.57, 177,583.42 and 83,457.01

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Solution

The fourth proportional to 128,795.57, 177,583.42 and 83,457.01 is: 115,070.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,795.57 : 177,583.42 = 83,457.01 : x
  2. Step 2: Convert to fraction form
    128,795.57/177,583.42 = 83,457.01/x
  3. Step 3: Cross multiply
    128,795.57x = 177,583.42 × 83,457.01
  4. Step 4: Simplify right side
    128,795.57x = 14,820,581,258.77
  5. Step 5: Solve for x
    x = 14,820,581,258.77/128,795.57
  6. Step 6: Final answer
    x = 115,070.58

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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.