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Finding the Fourth Proportional to 143,038.63, 197,256.13 and 85,668.76

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Solution

The fourth proportional to 143,038.63, 197,256.13 and 85,668.76 is: 118,140.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,038.63 : 197,256.13 = 85,668.76 : x
  2. Step 2: Convert to fraction form
    143,038.63/197,256.13 = 85,668.76/x
  3. Step 3: Cross multiply
    143,038.63x = 197,256.13 × 85,668.76
  4. Step 4: Simplify right side
    143,038.63x = 16,898,688,059.50
  5. Step 5: Solve for x
    x = 16,898,688,059.50/143,038.63
  6. Step 6: Final answer
    x = 118,140.73

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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.