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Finding the Fourth Proportional to 143,777.60, 215,666.40 and 72,918.80

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Solution

The fourth proportional to 143,777.60, 215,666.40 and 72,918.80 is: 109,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,777.60 : 215,666.40 = 72,918.80 : x
  2. Step 2: Convert to fraction form
    143,777.60/215,666.40 = 72,918.80/x
  3. Step 3: Cross multiply
    143,777.60x = 215,666.40 × 72,918.80
  4. Step 4: Simplify right side
    143,777.60x = 15,726,135,088.32
  5. Step 5: Solve for x
    x = 15,726,135,088.32/143,777.60
  6. Step 6: Final answer
    x = 109,378.20

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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.