Home / 72,200.36-99,638.70-40,374.92

Finding the Fourth Proportional to 72,200.36, 99,638.70 and 40,374.92

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Solution

The fourth proportional to 72,200.36, 99,638.70 and 40,374.92 is: 55,718.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,200.36 : 99,638.70 = 40,374.92 : x
  2. Step 2: Convert to fraction form
    72,200.36/99,638.70 = 40,374.92/x
  3. Step 3: Cross multiply
    72,200.36x = 99,638.70 × 40,374.92
  4. Step 4: Simplify right side
    72,200.36x = 4,022,904,541.40
  5. Step 5: Solve for x
    x = 4,022,904,541.40/72,200.36
  6. Step 6: Final answer
    x = 55,718.62

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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.