Home / 72,749.32-100,390.38-40,916.32

Finding the Fourth Proportional to 72,749.32, 100,390.38 and 40,916.32

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Solution

The fourth proportional to 72,749.32, 100,390.38 and 40,916.32 is: 56,462.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,749.32 : 100,390.38 = 40,916.32 : x
  2. Step 2: Convert to fraction form
    72,749.32/100,390.38 = 40,916.32/x
  3. Step 3: Cross multiply
    72,749.32x = 100,390.38 × 40,916.32
  4. Step 4: Simplify right side
    72,749.32x = 4,107,604,913.00
  5. Step 5: Solve for x
    x = 4,107,604,913.00/72,749.32
  6. Step 6: Final answer
    x = 56,462.45

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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.