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Finding the Fourth Proportional to 43,875.80, 65,813.70 and 40,938.20

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Solution

The fourth proportional to 43,875.80, 65,813.70 and 40,938.20 is: 61,407.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,875.80 : 65,813.70 = 40,938.20 : x
  2. Step 2: Convert to fraction form
    43,875.80/65,813.70 = 40,938.20/x
  3. Step 3: Cross multiply
    43,875.80x = 65,813.70 × 40,938.20
  4. Step 4: Simplify right side
    43,875.80x = 2,694,294,413.34
  5. Step 5: Solve for x
    x = 2,694,294,413.34/43,875.80
  6. Step 6: Final answer
    x = 61,407.30

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1.5x scale

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.