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Finding the Fourth Proportional to 72,947.48, 109,421.21 and 37,813.32

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Solution

The fourth proportional to 72,947.48, 109,421.21 and 37,813.32 is: 56,719.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,947.48 : 109,421.21 = 37,813.32 : x
  2. Step 2: Convert to fraction form
    72,947.48/109,421.21 = 37,813.32/x
  3. Step 3: Cross multiply
    72,947.48x = 109,421.21 × 37,813.32
  4. Step 4: Simplify right side
    72,947.48x = 4,137,579,039.45
  5. Step 5: Solve for x
    x = 4,137,579,039.45/72,947.48
  6. Step 6: Final answer
    x = 56,719.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.