Home / 128,673.36-177,559.56-72,075.60

Finding the Fourth Proportional to 128,673.36, 177,559.56 and 72,075.60

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Solution

The fourth proportional to 128,673.36, 177,559.56 and 72,075.60 is: 99,458.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,673.36 : 177,559.56 = 72,075.60 : x
  2. Step 2: Convert to fraction form
    128,673.36/177,559.56 = 72,075.60/x
  3. Step 3: Cross multiply
    128,673.36x = 177,559.56 × 72,075.60
  4. Step 4: Simplify right side
    128,673.36x = 12,797,711,822.74
  5. Step 5: Solve for x
    x = 12,797,711,822.74/128,673.36
  6. Step 6: Final answer
    x = 99,458.91

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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.