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Finding the Fourth Proportional to 145,615.76, 218,423.55 and 40,434.70

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Solution

The fourth proportional to 145,615.76, 218,423.55 and 40,434.70 is: 60,652.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,615.76 : 218,423.55 = 40,434.70 : x
  2. Step 2: Convert to fraction form
    145,615.76/218,423.55 = 40,434.70/x
  3. Step 3: Cross multiply
    145,615.76x = 218,423.55 × 40,434.70
  4. Step 4: Simplify right side
    145,615.76x = 8,831,890,717.19
  5. Step 5: Solve for x
    x = 8,831,890,717.19/145,615.76
  6. Step 6: Final answer
    x = 60,652.03

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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.