Home / 128,875.52-177,444.06-117,065.72

Finding the Fourth Proportional to 128,875.52, 177,444.06 and 117,065.72

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Solution

The fourth proportional to 128,875.52, 177,444.06 and 117,065.72 is: 161,183.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,875.52 : 177,444.06 = 117,065.72 : x
  2. Step 2: Convert to fraction form
    128,875.52/177,444.06 = 117,065.72/x
  3. Step 3: Cross multiply
    128,875.52x = 177,444.06 × 117,065.72
  4. Step 4: Simplify right side
    128,875.52x = 20,772,616,643.62
  5. Step 5: Solve for x
    x = 20,772,616,643.62/128,875.52
  6. Step 6: Final answer
    x = 161,183.57

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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.