Home / 128,019.02-176,665.86-71,430.39

Finding the Fourth Proportional to 128,019.02, 176,665.86 and 71,430.39

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Solution

The fourth proportional to 128,019.02, 176,665.86 and 71,430.39 is: 98,573.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,019.02 : 176,665.86 = 71,430.39 : x
  2. Step 2: Convert to fraction form
    128,019.02/176,665.86 = 71,430.39/x
  3. Step 3: Cross multiply
    128,019.02x = 176,665.86 × 71,430.39
  4. Step 4: Simplify right side
    128,019.02x = 12,619,311,279.49
  5. Step 5: Solve for x
    x = 12,619,311,279.49/128,019.02
  6. Step 6: Final answer
    x = 98,573.73

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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.