Home / 128,488.02-177,314.04-71,895.75

Finding the Fourth Proportional to 128,488.02, 177,314.04 and 71,895.75

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Solution

The fourth proportional to 128,488.02, 177,314.04 and 71,895.75 is: 99,216.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,488.02 : 177,314.04 = 71,895.75 : x
  2. Step 2: Convert to fraction form
    128,488.02/177,314.04 = 71,895.75/x
  3. Step 3: Cross multiply
    128,488.02x = 177,314.04 × 71,895.75
  4. Step 4: Simplify right side
    128,488.02x = 12,748,125,891.33
  5. Step 5: Solve for x
    x = 12,748,125,891.33/128,488.02
  6. Step 6: Final answer
    x = 99,216.46

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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.