Home / 128,018.80-176,665.89-71,430.13

Finding the Fourth Proportional to 128,018.80, 176,665.89 and 71,430.13

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Solution

The fourth proportional to 128,018.80, 176,665.89 and 71,430.13 is: 98,573.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,018.80 : 176,665.89 = 71,430.13 : x
  2. Step 2: Convert to fraction form
    128,018.80/176,665.89 = 71,430.13/x
  3. Step 3: Cross multiply
    128,018.80x = 176,665.89 × 71,430.13
  4. Step 4: Simplify right side
    128,018.80x = 12,619,267,489.27
  5. Step 5: Solve for x
    x = 12,619,267,489.27/128,018.80
  6. Step 6: Final answer
    x = 98,573.55

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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.