Home / 128,122,348.19-192,490,116.90-82,154,279.07

Finding the Fourth Proportional to 128,122,348.19, 192,490,116.90 and 82,154,279.07

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Solution

The fourth proportional to 128,122,348.19, 192,490,116.90 and 82,154,279.07 is: 123,428,012.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,122,348.19 : 192,490,116.90 = 82,154,279.07 : x
  2. Step 2: Convert to fraction form
    128,122,348.19/192,490,116.90 = 82,154,279.07/x
  3. Step 3: Cross multiply
    128,122,348.19x = 192,490,116.90 × 82,154,279.07
  4. Step 4: Simplify right side
    128,122,348.19x = 15,813,886,781,605,764
  5. Step 5: Solve for x
    x = 15,813,886,781,605,764/128,122,348.19
  6. Step 6: Final answer
    x = 123,428,012.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.