Home / 128,030.12-176,681.76-71,441.66

Finding the Fourth Proportional to 128,030.12, 176,681.76 and 71,441.66

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Solution

The fourth proportional to 128,030.12, 176,681.76 and 71,441.66 is: 98,589.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,030.12 : 176,681.76 = 71,441.66 : x
  2. Step 2: Convert to fraction form
    128,030.12/176,681.76 = 71,441.66/x
  3. Step 3: Cross multiply
    128,030.12x = 176,681.76 × 71,441.66
  4. Step 4: Simplify right side
    128,030.12x = 12,622,438,226.12
  5. Step 5: Solve for x
    x = 12,622,438,226.12/128,030.12
  6. Step 6: Final answer
    x = 98,589.60

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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.