Home / 78,986,411.21-118,484,815.50-20,695,516.55

Finding the Fourth Proportional to 78,986,411.21, 118,484,815.50 and 20,695,516.55

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Solution

The fourth proportional to 78,986,411.21, 118,484,815.50 and 20,695,516.55 is: 31,044,636.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,986,411.21 : 118,484,815.50 = 20,695,516.55 : x
  2. Step 2: Convert to fraction form
    78,986,411.21/118,484,815.50 = 20,695,516.55/x
  3. Step 3: Cross multiply
    78,986,411.21x = 118,484,815.50 × 20,695,516.55
  4. Step 4: Simplify right side
    78,986,411.21x = 2,452,104,460,103,946.50
  5. Step 5: Solve for x
    x = 2,452,104,460,103,946.50/78,986,411.21
  6. Step 6: Final answer
    x = 31,044,636.95

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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.