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Finding the Fourth Proportional to 72,339.80, 99,830.24 and 40,509.24

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Solution

The fourth proportional to 72,339.80, 99,830.24 and 40,509.24 is: 55,903.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,339.80 : 99,830.24 = 40,509.24 : x
  2. Step 2: Convert to fraction form
    72,339.80/99,830.24 = 40,509.24/x
  3. Step 3: Cross multiply
    72,339.80x = 99,830.24 × 40,509.24
  4. Step 4: Simplify right side
    72,339.80x = 4,044,047,151.42
  5. Step 5: Solve for x
    x = 4,044,047,151.42/72,339.80
  6. Step 6: Final answer
    x = 55,903.49

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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.