Home / 128,490.07-177,313.47-70,346.68

Finding the Fourth Proportional to 128,490.07, 177,313.47 and 70,346.68

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Solution

The fourth proportional to 128,490.07, 177,313.47 and 70,346.68 is: 97,076.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,490.07 : 177,313.47 = 70,346.68 : x
  2. Step 2: Convert to fraction form
    128,490.07/177,313.47 = 70,346.68/x
  3. Step 3: Cross multiply
    128,490.07x = 177,313.47 × 70,346.68
  4. Step 4: Simplify right side
    128,490.07x = 12,473,413,770.78
  5. Step 5: Solve for x
    x = 12,473,413,770.78/128,490.07
  6. Step 6: Final answer
    x = 97,076.87

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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.