Home / 128,424.29-177,225.98-71,835.66

Finding the Fourth Proportional to 128,424.29, 177,225.98 and 71,835.66

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Solution

The fourth proportional to 128,424.29, 177,225.98 and 71,835.66 is: 99,133.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,424.29 : 177,225.98 = 71,835.66 : x
  2. Step 2: Convert to fraction form
    128,424.29/177,225.98 = 71,835.66/x
  3. Step 3: Cross multiply
    128,424.29x = 177,225.98 × 71,835.66
  4. Step 4: Simplify right side
    128,424.29x = 12,731,144,883.27
  5. Step 5: Solve for x
    x = 12,731,144,883.27/128,424.29
  6. Step 6: Final answer
    x = 99,133.47

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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.