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Finding the Fourth Proportional to 72,888.80, 109,376.40 and 48,000.20

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Solution

The fourth proportional to 72,888.80, 109,376.40 and 48,000.20 is: 72,028.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,888.80 : 109,376.40 = 48,000.20 : x
  2. Step 2: Convert to fraction form
    72,888.80/109,376.40 = 48,000.20/x
  3. Step 3: Cross multiply
    72,888.80x = 109,376.40 × 48,000.20
  4. Step 4: Simplify right side
    72,888.80x = 5,250,089,075.28
  5. Step 5: Solve for x
    x = 5,250,089,075.28/72,888.80
  6. Step 6: Final answer
    x = 72,028.75

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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.