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Finding the Fourth Proportional to 72,488.80, 108,646.80 and 37,410.40

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Solution

The fourth proportional to 72,488.80, 108,646.80 and 37,410.40 is: 56,071.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,488.80 : 108,646.80 = 37,410.40 : x
  2. Step 2: Convert to fraction form
    72,488.80/108,646.80 = 37,410.40/x
  3. Step 3: Cross multiply
    72,488.80x = 108,646.80 × 37,410.40
  4. Step 4: Simplify right side
    72,488.80x = 4,064,520,246.72
  5. Step 5: Solve for x
    x = 4,064,520,246.72/72,488.80
  6. Step 6: Final answer
    x = 56,071.01

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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.