Home / 128,829.48-177,779.34-77,872.08

Finding the Fourth Proportional to 128,829.48, 177,779.34 and 77,872.08

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Solution

The fourth proportional to 128,829.48, 177,779.34 and 77,872.08 is: 107,460.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,829.48 : 177,779.34 = 77,872.08 : x
  2. Step 2: Convert to fraction form
    128,829.48/177,779.34 = 77,872.08/x
  3. Step 3: Cross multiply
    128,829.48x = 177,779.34 × 77,872.08
  4. Step 4: Simplify right side
    128,829.48x = 13,844,046,986.83
  5. Step 5: Solve for x
    x = 13,844,046,986.83/128,829.48
  6. Step 6: Final answer
    x = 107,460.24

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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.