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Finding the Fourth Proportional to 91,630.40, 137,445.60 and 90,401.60

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Solution

The fourth proportional to 91,630.40, 137,445.60 and 90,401.60 is: 135,602.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,630.40 : 137,445.60 = 90,401.60 : x
  2. Step 2: Convert to fraction form
    91,630.40/137,445.60 = 90,401.60/x
  3. Step 3: Cross multiply
    91,630.40x = 137,445.60 × 90,401.60
  4. Step 4: Simplify right side
    91,630.40x = 12,425,302,152.96
  5. Step 5: Solve for x
    x = 12,425,302,152.96/91,630.40
  6. Step 6: Final answer
    x = 135,602.40

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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.