Home / 128,276.82-177,038.73-71,699.94

Finding the Fourth Proportional to 128,276.82, 177,038.73 and 71,699.94

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Solution

The fourth proportional to 128,276.82, 177,038.73 and 71,699.94 is: 98,955.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,276.82 : 177,038.73 = 71,699.94 : x
  2. Step 2: Convert to fraction form
    128,276.82/177,038.73 = 71,699.94/x
  3. Step 3: Cross multiply
    128,276.82x = 177,038.73 × 71,699.94
  4. Step 4: Simplify right side
    128,276.82x = 12,693,666,318.68
  5. Step 5: Solve for x
    x = 12,693,666,318.68/128,276.82
  6. Step 6: Final answer
    x = 98,955.26

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1.5x scale

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.