Home / 136,220.64-187,981.55-78,862.38

Finding the Fourth Proportional to 136,220.64, 187,981.55 and 78,862.38

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Solution

The fourth proportional to 136,220.64, 187,981.55 and 78,862.38 is: 108,828.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,220.64 : 187,981.55 = 78,862.38 : x
  2. Step 2: Convert to fraction form
    136,220.64/187,981.55 = 78,862.38/x
  3. Step 3: Cross multiply
    136,220.64x = 187,981.55 × 78,862.38
  4. Step 4: Simplify right side
    136,220.64x = 14,824,672,034.78
  5. Step 5: Solve for x
    x = 14,824,672,034.78/136,220.64
  6. Step 6: Final answer
    x = 108,828.38

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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.