Home / 52,478.08-78,705.60-21,320.32

Finding the Fourth Proportional to 52,478.08, 78,705.60 and 21,320.32

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Solution

The fourth proportional to 52,478.08, 78,705.60 and 21,320.32 is: 31,975.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,478.08 : 78,705.60 = 21,320.32 : x
  2. Step 2: Convert to fraction form
    52,478.08/78,705.60 = 21,320.32/x
  3. Step 3: Cross multiply
    52,478.08x = 78,705.60 × 21,320.32
  4. Step 4: Simplify right side
    52,478.08x = 1,678,028,577.79
  5. Step 5: Solve for x
    x = 1,678,028,577.79/52,478.08
  6. Step 6: Final answer
    x = 31,975.80

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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.