Home / 128,279.10-177,040.56-74,564.13

Finding the Fourth Proportional to 128,279.10, 177,040.56 and 74,564.13

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Solution

The fourth proportional to 128,279.10, 177,040.56 and 74,564.13 is: 102,907.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,279.10 : 177,040.56 = 74,564.13 : x
  2. Step 2: Convert to fraction form
    128,279.10/177,040.56 = 74,564.13/x
  3. Step 3: Cross multiply
    128,279.10x = 177,040.56 × 74,564.13
  4. Step 4: Simplify right side
    128,279.10x = 13,200,875,331.11
  5. Step 5: Solve for x
    x = 13,200,875,331.11/128,279.10
  6. Step 6: Final answer
    x = 102,907.45

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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.