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Finding the Fourth Proportional to 72,400.32, 99,878.67 and 45,557.64

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Solution

The fourth proportional to 72,400.32, 99,878.67 and 45,557.64 is: 62,848.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,400.32 : 99,878.67 = 45,557.64 : x
  2. Step 2: Convert to fraction form
    72,400.32/99,878.67 = 45,557.64/x
  3. Step 3: Cross multiply
    72,400.32x = 99,878.67 × 45,557.64
  4. Step 4: Simplify right side
    72,400.32x = 4,550,236,491.54
  5. Step 5: Solve for x
    x = 4,550,236,491.54/72,400.32
  6. Step 6: Final answer
    x = 62,848.29

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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.