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Finding the Fourth Proportional to 112,408.40, 168,612.60 and 56,421.20

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Solution

The fourth proportional to 112,408.40, 168,612.60 and 56,421.20 is: 84,631.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,408.40 : 168,612.60 = 56,421.20 : x
  2. Step 2: Convert to fraction form
    112,408.40/168,612.60 = 56,421.20/x
  3. Step 3: Cross multiply
    112,408.40x = 168,612.60 × 56,421.20
  4. Step 4: Simplify right side
    112,408.40x = 9,513,325,227.12
  5. Step 5: Solve for x
    x = 9,513,325,227.12/112,408.40
  6. Step 6: Final answer
    x = 84,631.80

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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.