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Finding the Fourth Proportional to 74,070.72, 111,106.80 and 18,666.72

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Solution

The fourth proportional to 74,070.72, 111,106.80 and 18,666.72 is: 28,000.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,070.72 : 111,106.80 = 18,666.72 : x
  2. Step 2: Convert to fraction form
    74,070.72/111,106.80 = 18,666.72/x
  3. Step 3: Cross multiply
    74,070.72x = 111,106.80 × 18,666.72
  4. Step 4: Simplify right side
    74,070.72x = 2,073,999,525.70
  5. Step 5: Solve for x
    x = 2,073,999,525.70/74,070.72
  6. Step 6: Final answer
    x = 28,000.26

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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.