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Finding the Fourth Proportional to 84,420.60, 126,630.90 and 64,737.60

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Solution

The fourth proportional to 84,420.60, 126,630.90 and 64,737.60 is: 97,106.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,420.60 : 126,630.90 = 64,737.60 : x
  2. Step 2: Convert to fraction form
    84,420.60/126,630.90 = 64,737.60/x
  3. Step 3: Cross multiply
    84,420.60x = 126,630.90 × 64,737.60
  4. Step 4: Simplify right side
    84,420.60x = 8,197,780,551.84
  5. Step 5: Solve for x
    x = 8,197,780,551.84/84,420.60
  6. Step 6: Final answer
    x = 97,106.40

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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.