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Finding the Fourth Proportional to 143,615.70, 215,423.64 and 68,718.24

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Solution

The fourth proportional to 143,615.70, 215,423.64 and 68,718.24 is: 103,077.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,615.70 : 215,423.64 = 68,718.24 : x
  2. Step 2: Convert to fraction form
    143,615.70/215,423.64 = 68,718.24/x
  3. Step 3: Cross multiply
    143,615.70x = 215,423.64 × 68,718.24
  4. Step 4: Simplify right side
    143,615.70x = 14,803,533,395.19
  5. Step 5: Solve for x
    x = 14,803,533,395.19/143,615.70
  6. Step 6: Final answer
    x = 103,077.40

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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.