Home / 77,639.42-116,461.40-21,479.98

Finding the Fourth Proportional to 77,639.42, 116,461.40 and 21,479.98

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Solution

The fourth proportional to 77,639.42, 116,461.40 and 21,479.98 is: 32,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,639.42 : 116,461.40 = 21,479.98 : x
  2. Step 2: Convert to fraction form
    77,639.42/116,461.40 = 21,479.98/x
  3. Step 3: Cross multiply
    77,639.42x = 116,461.40 × 21,479.98
  4. Step 4: Simplify right side
    77,639.42x = 2,501,588,542.77
  5. Step 5: Solve for x
    x = 2,501,588,542.77/77,639.42
  6. Step 6: Final answer
    x = 32,220.60

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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.