Home / 129,393,517-178,417,486.74-105,798,437.32

Finding the Fourth Proportional to 129,393,517, 178,417,486.74 and 105,798,437.32

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Solution

The fourth proportional to 129,393,517, 178,417,486.74 and 105,798,437.32 is: 145,882,821.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,393,517 : 178,417,486.74 = 105,798,437.32 : x
  2. Step 2: Convert to fraction form
    129,393,517/178,417,486.74 = 105,798,437.32/x
  3. Step 3: Cross multiply
    129,393,517x = 178,417,486.74 × 105,798,437.32
  4. Step 4: Simplify right side
    129,393,517x = 18,876,291,287,653,820
  5. Step 5: Solve for x
    x = 18,876,291,287,653,820/129,393,517
  6. Step 6: Final answer
    x = 145,882,821.07

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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.