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Finding the Fourth Proportional to 118,611, 163,678.36 and 70,890.66

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Solution

The fourth proportional to 118,611, 163,678.36 and 70,890.66 is: 97,826.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,611 : 163,678.36 = 70,890.66 : x
  2. Step 2: Convert to fraction form
    118,611/163,678.36 = 70,890.66/x
  3. Step 3: Cross multiply
    118,611x = 163,678.36 × 70,890.66
  4. Step 4: Simplify right side
    118,611x = 11,603,266,968.12
  5. Step 5: Solve for x
    x = 11,603,266,968.12/118,611
  6. Step 6: Final answer
    x = 97,826.23

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1.5x scale

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.