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Finding the Fourth Proportional to 71,113.58, 98,130.39 and 40,890.86

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Solution

The fourth proportional to 71,113.58, 98,130.39 and 40,890.86 is: 56,425.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,113.58 : 98,130.39 = 40,890.86 : x
  2. Step 2: Convert to fraction form
    71,113.58/98,130.39 = 40,890.86/x
  3. Step 3: Cross multiply
    71,113.58x = 98,130.39 × 40,890.86
  4. Step 4: Simplify right side
    71,113.58x = 4,012,636,039.24
  5. Step 5: Solve for x
    x = 4,012,636,039.24/71,113.58
  6. Step 6: Final answer
    x = 56,425.74

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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.