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Finding the Fourth Proportional to 70,420.50, 97,180.30 and 40,612.50

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Solution

The fourth proportional to 70,420.50, 97,180.30 and 40,612.50 is: 56,045.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,420.50 : 97,180.30 = 40,612.50 : x
  2. Step 2: Convert to fraction form
    70,420.50/97,180.30 = 40,612.50/x
  3. Step 3: Cross multiply
    70,420.50x = 97,180.30 × 40,612.50
  4. Step 4: Simplify right side
    70,420.50x = 3,946,734,933.75
  5. Step 5: Solve for x
    x = 3,946,734,933.75/70,420.50
  6. Step 6: Final answer
    x = 56,045.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.