Home / 128,499.08-177,347.29-74,040.83

Finding the Fourth Proportional to 128,499.08, 177,347.29 and 74,040.83

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Solution

The fourth proportional to 128,499.08, 177,347.29 and 74,040.83 is: 102,187.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,499.08 : 177,347.29 = 74,040.83 : x
  2. Step 2: Convert to fraction form
    128,499.08/177,347.29 = 74,040.83/x
  3. Step 3: Cross multiply
    128,499.08x = 177,347.29 × 74,040.83
  4. Step 4: Simplify right side
    128,499.08x = 13,130,939,663.11
  5. Step 5: Solve for x
    x = 13,130,939,663.11/128,499.08
  6. Step 6: Final answer
    x = 102,187.03

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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.