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Finding the Fourth Proportional to 103,511.99, 142,954.98 and 71,330.28

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Solution

The fourth proportional to 103,511.99, 142,954.98 and 71,330.28 is: 98,510.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,511.99 : 142,954.98 = 71,330.28 : x
  2. Step 2: Convert to fraction form
    103,511.99/142,954.98 = 71,330.28/x
  3. Step 3: Cross multiply
    103,511.99x = 142,954.98 × 71,330.28
  4. Step 4: Simplify right side
    103,511.99x = 10,197,018,750.79
  5. Step 5: Solve for x
    x = 10,197,018,750.79/103,511.99
  6. Step 6: Final answer
    x = 98,510.51

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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.