Home / 128,584.10-177,440.95-71,994.26

Finding the Fourth Proportional to 128,584.10, 177,440.95 and 71,994.26

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Solution

The fourth proportional to 128,584.10, 177,440.95 and 71,994.26 is: 99,349.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,584.10 : 177,440.95 = 71,994.26 : x
  2. Step 2: Convert to fraction form
    128,584.10/177,440.95 = 71,994.26/x
  3. Step 3: Cross multiply
    128,584.10x = 177,440.95 × 71,994.26
  4. Step 4: Simplify right side
    128,584.10x = 12,774,729,888.95
  5. Step 5: Solve for x
    x = 12,774,729,888.95/128,584.10
  6. Step 6: Final answer
    x = 99,349.22

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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.