Home / 128,003.07-176,643.95-74,319.51

Finding the Fourth Proportional to 128,003.07, 176,643.95 and 74,319.51

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Solution

The fourth proportional to 128,003.07, 176,643.95 and 74,319.51 is: 102,560.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,003.07 : 176,643.95 = 74,319.51 : x
  2. Step 2: Convert to fraction form
    128,003.07/176,643.95 = 74,319.51/x
  3. Step 3: Cross multiply
    128,003.07x = 176,643.95 × 74,319.51
  4. Step 4: Simplify right side
    128,003.07x = 13,128,091,436.87
  5. Step 5: Solve for x
    x = 13,128,091,436.87/128,003.07
  6. Step 6: Final answer
    x = 102,560.75

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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.