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Finding the Fourth Proportional to 72,403.80, 108,702.90 and 46,159.80

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Solution

The fourth proportional to 72,403.80, 108,702.90 and 46,159.80 is: 69,301.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,403.80 : 108,702.90 = 46,159.80 : x
  2. Step 2: Convert to fraction form
    72,403.80/108,702.90 = 46,159.80/x
  3. Step 3: Cross multiply
    72,403.80x = 108,702.90 × 46,159.80
  4. Step 4: Simplify right side
    72,403.80x = 5,017,704,123.42
  5. Step 5: Solve for x
    x = 5,017,704,123.42/72,403.80
  6. Step 6: Final answer
    x = 69,301.67

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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.