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Finding the Fourth Proportional to 129,362.58, 178,461.36 and 93,495.78

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Solution

The fourth proportional to 129,362.58, 178,461.36 and 93,495.78 is: 128,981.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,362.58 : 178,461.36 = 93,495.78 : x
  2. Step 2: Convert to fraction form
    129,362.58/178,461.36 = 93,495.78/x
  3. Step 3: Cross multiply
    129,362.58x = 178,461.36 × 93,495.78
  4. Step 4: Simplify right side
    129,362.58x = 16,685,384,053.06
  5. Step 5: Solve for x
    x = 16,685,384,053.06/129,362.58
  6. Step 6: Final answer
    x = 128,981.53

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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.