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Finding the Fourth Proportional to 28,000,602.70, 42,000,904.05 and 20,347,852.30

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Solution

The fourth proportional to 28,000,602.70, 42,000,904.05 and 20,347,852.30 is: 30,521,778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000,602.70 : 42,000,904.05 = 20,347,852.30 : x
  2. Step 2: Convert to fraction form
    28,000,602.70/42,000,904.05 = 20,347,852.30/x
  3. Step 3: Cross multiply
    28,000,602.70x = 42,000,904.05 × 20,347,852.30
  4. Step 4: Simplify right side
    28,000,602.70x = 854,628,192,075,871.75
  5. Step 5: Solve for x
    x = 854,628,192,075,871.75/28,000,602.70
  6. Step 6: Final answer
    x = 30,521,778.45

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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.