Home / 72,439.63-99,999.42-45,621.54

Finding the Fourth Proportional to 72,439.63, 99,999.42 and 45,621.54

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Solution

The fourth proportional to 72,439.63, 99,999.42 and 45,621.54 is: 62,978.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,439.63 : 99,999.42 = 45,621.54 : x
  2. Step 2: Convert to fraction form
    72,439.63/99,999.42 = 45,621.54/x
  3. Step 3: Cross multiply
    72,439.63x = 99,999.42 × 45,621.54
  4. Step 4: Simplify right side
    72,439.63x = 4,562,127,539.51
  5. Step 5: Solve for x
    x = 4,562,127,539.51/72,439.63
  6. Step 6: Final answer
    x = 62,978.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.