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Finding the Fourth Proportional to 71,909.80, 99,281.70 and 46,427.60

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Solution

The fourth proportional to 71,909.80, 99,281.70 and 46,427.60 is: 64,099.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,909.80 : 99,281.70 = 46,427.60 : x
  2. Step 2: Convert to fraction form
    71,909.80/99,281.70 = 46,427.60/x
  3. Step 3: Cross multiply
    71,909.80x = 99,281.70 × 46,427.60
  4. Step 4: Simplify right side
    71,909.80x = 4,609,411,054.92
  5. Step 5: Solve for x
    x = 4,609,411,054.92/71,909.80
  6. Step 6: Final answer
    x = 64,099.90

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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.