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Finding the Fourth Proportional to 72,408.30, 108,612.45 and 47,460.30

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Solution

The fourth proportional to 72,408.30, 108,612.45 and 47,460.30 is: 71,190.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,408.30 : 108,612.45 = 47,460.30 : x
  2. Step 2: Convert to fraction form
    72,408.30/108,612.45 = 47,460.30/x
  3. Step 3: Cross multiply
    72,408.30x = 108,612.45 × 47,460.30
  4. Step 4: Simplify right side
    72,408.30x = 5,154,779,460.74
  5. Step 5: Solve for x
    x = 5,154,779,460.74/72,408.30
  6. Step 6: Final answer
    x = 71,190.45

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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.