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Finding the Fourth Proportional to 104,657.90, 156,986.85 and 42,328.40

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Solution

The fourth proportional to 104,657.90, 156,986.85 and 42,328.40 is: 63,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,657.90 : 156,986.85 = 42,328.40 : x
  2. Step 2: Convert to fraction form
    104,657.90/156,986.85 = 42,328.40/x
  3. Step 3: Cross multiply
    104,657.90x = 156,986.85 × 42,328.40
  4. Step 4: Simplify right side
    104,657.90x = 6,645,002,181.54
  5. Step 5: Solve for x
    x = 6,645,002,181.54/104,657.90
  6. Step 6: Final answer
    x = 63,492.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.