Home / 129,393,520-178,417,490.88-105,798,440.32

Finding the Fourth Proportional to 129,393,520, 178,417,490.88 and 105,798,440.32

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Solution

The fourth proportional to 129,393,520, 178,417,490.88 and 105,798,440.32 is: 145,882,825.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,393,520 : 178,417,490.88 = 105,798,440.32 : x
  2. Step 2: Convert to fraction form
    129,393,520/178,417,490.88 = 105,798,440.32/x
  3. Step 3: Cross multiply
    129,393,520x = 178,417,490.88 × 105,798,440.32
  4. Step 4: Simplify right side
    129,393,520x = 18,876,292,260,911,824
  5. Step 5: Solve for x
    x = 18,876,292,260,911,824/129,393,520
  6. Step 6: Final answer
    x = 145,882,825.21

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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.