Home / 72,308.66-99,781.26-40,477.28

Finding the Fourth Proportional to 72,308.66, 99,781.26 and 40,477.28

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Solution

The fourth proportional to 72,308.66, 99,781.26 and 40,477.28 is: 55,856.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,308.66 : 99,781.26 = 40,477.28 : x
  2. Step 2: Convert to fraction form
    72,308.66/99,781.26 = 40,477.28/x
  3. Step 3: Cross multiply
    72,308.66x = 99,781.26 × 40,477.28
  4. Step 4: Simplify right side
    72,308.66x = 4,038,873,999.77
  5. Step 5: Solve for x
    x = 4,038,873,999.77/72,308.66
  6. Step 6: Final answer
    x = 55,856.02

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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.