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Finding the Fourth Proportional to 103,955.68, 143,461.20 and 61,521.76

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Solution

The fourth proportional to 103,955.68, 143,461.20 and 61,521.76 is: 84,901.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,955.68 : 143,461.20 = 61,521.76 : x
  2. Step 2: Convert to fraction form
    103,955.68/143,461.20 = 61,521.76/x
  3. Step 3: Cross multiply
    103,955.68x = 143,461.20 × 61,521.76
  4. Step 4: Simplify right side
    103,955.68x = 8,825,985,515.71
  5. Step 5: Solve for x
    x = 8,825,985,515.71/103,955.68
  6. Step 6: Final answer
    x = 84,901.43

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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.