Home / 128,501.45-177,387.60-96,678.17

Finding the Fourth Proportional to 128,501.45, 177,387.60 and 96,678.17

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Solution

The fourth proportional to 128,501.45, 177,387.60 and 96,678.17 is: 133,457.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,501.45 : 177,387.60 = 96,678.17 : x
  2. Step 2: Convert to fraction form
    128,501.45/177,387.60 = 96,678.17/x
  3. Step 3: Cross multiply
    128,501.45x = 177,387.60 × 96,678.17
  4. Step 4: Simplify right side
    128,501.45x = 17,149,507,661.75
  5. Step 5: Solve for x
    x = 17,149,507,661.75/128,501.45
  6. Step 6: Final answer
    x = 133,457.70

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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.