Home / 128,559.03-177,427.31-77,601.02

Finding the Fourth Proportional to 128,559.03, 177,427.31 and 77,601.02

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Solution

The fourth proportional to 128,559.03, 177,427.31 and 77,601.02 is: 107,098.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,559.03 : 177,427.31 = 77,601.02 : x
  2. Step 2: Convert to fraction form
    128,559.03/177,427.31 = 77,601.02/x
  3. Step 3: Cross multiply
    128,559.03x = 177,427.31 × 77,601.02
  4. Step 4: Simplify right side
    128,559.03x = 13,768,538,956.71
  5. Step 5: Solve for x
    x = 13,768,538,956.71/128,559.03
  6. Step 6: Final answer
    x = 107,098.96

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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.