Home / 128,077.08-176,749.15-70,716.21

Finding the Fourth Proportional to 128,077.08, 176,749.15 and 70,716.21

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Solution

The fourth proportional to 128,077.08, 176,749.15 and 70,716.21 is: 97,589.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,077.08 : 176,749.15 = 70,716.21 : x
  2. Step 2: Convert to fraction form
    128,077.08/176,749.15 = 70,716.21/x
  3. Step 3: Cross multiply
    128,077.08x = 176,749.15 × 70,716.21
  4. Step 4: Simplify right side
    128,077.08x = 12,499,030,008.72
  5. Step 5: Solve for x
    x = 12,499,030,008.72/128,077.08
  6. Step 6: Final answer
    x = 97,589.90

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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.