Home / 128,100.48-176,780.08-70,739.72

Finding the Fourth Proportional to 128,100.48, 176,780.08 and 70,739.72

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Solution

The fourth proportional to 128,100.48, 176,780.08 and 70,739.72 is: 97,621.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,100.48 : 176,780.08 = 70,739.72 : x
  2. Step 2: Convert to fraction form
    128,100.48/176,780.08 = 70,739.72/x
  3. Step 3: Cross multiply
    128,100.48x = 176,780.08 × 70,739.72
  4. Step 4: Simplify right side
    128,100.48x = 12,505,373,360.78
  5. Step 5: Solve for x
    x = 12,505,373,360.78/128,100.48
  6. Step 6: Final answer
    x = 97,621.60

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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.