Home / 48,136.80-72,128.40-40,303.20

Finding the Fourth Proportional to 48,136.80, 72,128.40 and 40,303.20

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Solution

The fourth proportional to 48,136.80, 72,128.40 and 40,303.20 is: 60,390.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,136.80 : 72,128.40 = 40,303.20 : x
  2. Step 2: Convert to fraction form
    48,136.80/72,128.40 = 40,303.20/x
  3. Step 3: Cross multiply
    48,136.80x = 72,128.40 × 40,303.20
  4. Step 4: Simplify right side
    48,136.80x = 2,907,005,330.88
  5. Step 5: Solve for x
    x = 2,907,005,330.88/48,136.80
  6. Step 6: Final answer
    x = 60,390.50

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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.