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Finding the Fourth Proportional to 118,178.72, 163,104 and 70,460

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Solution

The fourth proportional to 118,178.72, 163,104 and 70,460 is: 97,245.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,178.72 : 163,104 = 70,460 : x
  2. Step 2: Convert to fraction form
    118,178.72/163,104 = 70,460/x
  3. Step 3: Cross multiply
    118,178.72x = 163,104 × 70,460
  4. Step 4: Simplify right side
    118,178.72x = 11,492,307,840
  5. Step 5: Solve for x
    x = 11,492,307,840/118,178.72
  6. Step 6: Final answer
    x = 97,245.15

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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.