Home / 128,569.80-177,420.40-71,205.26

Finding the Fourth Proportional to 128,569.80, 177,420.40 and 71,205.26

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Solution

The fourth proportional to 128,569.80, 177,420.40 and 71,205.26 is: 98,259.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,569.80 : 177,420.40 = 71,205.26 : x
  2. Step 2: Convert to fraction form
    128,569.80/177,420.40 = 71,205.26/x
  3. Step 3: Cross multiply
    128,569.80x = 177,420.40 × 71,205.26
  4. Step 4: Simplify right side
    128,569.80x = 12,633,265,711.30
  5. Step 5: Solve for x
    x = 12,633,265,711.30/128,569.80
  6. Step 6: Final answer
    x = 98,259.98

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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.