Home / 128,346.93-177,124.59-71,758.35

Finding the Fourth Proportional to 128,346.93, 177,124.59 and 71,758.35

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Solution

The fourth proportional to 128,346.93, 177,124.59 and 71,758.35 is: 99,029.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,346.93 : 177,124.59 = 71,758.35 : x
  2. Step 2: Convert to fraction form
    128,346.93/177,124.59 = 71,758.35/x
  3. Step 3: Cross multiply
    128,346.93x = 177,124.59 × 71,758.35
  4. Step 4: Simplify right side
    128,346.93x = 12,710,168,322.83
  5. Step 5: Solve for x
    x = 12,710,168,322.83/128,346.93
  6. Step 6: Final answer
    x = 99,029.78

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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.