Home / 129,393,516-178,417,485.36-105,798,436.32

Finding the Fourth Proportional to 129,393,516, 178,417,485.36 and 105,798,436.32

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Solution

The fourth proportional to 129,393,516, 178,417,485.36 and 105,798,436.32 is: 145,882,819.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,393,516 : 178,417,485.36 = 105,798,436.32 : x
  2. Step 2: Convert to fraction form
    129,393,516/178,417,485.36 = 105,798,436.32/x
  3. Step 3: Cross multiply
    129,393,516x = 178,417,485.36 × 105,798,436.32
  4. Step 4: Simplify right side
    129,393,516x = 18,876,290,963,234,492
  5. Step 5: Solve for x
    x = 18,876,290,963,234,492/129,393,516
  6. Step 6: Final answer
    x = 145,882,819.69

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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.