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Finding the Fourth Proportional to 72,815.08, 109,189.12 and 37,779.32

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Solution

The fourth proportional to 72,815.08, 109,189.12 and 37,779.32 is: 56,651.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,815.08 : 109,189.12 = 37,779.32 : x
  2. Step 2: Convert to fraction form
    72,815.08/109,189.12 = 37,779.32/x
  3. Step 3: Cross multiply
    72,815.08x = 109,189.12 × 37,779.32
  4. Step 4: Simplify right side
    72,815.08x = 4,125,090,705.00
  5. Step 5: Solve for x
    x = 4,125,090,705.00/72,815.08
  6. Step 6: Final answer
    x = 56,651.60

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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.