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Finding the Fourth Proportional to 72,689,063.80, 109,033,595.70 and 52,281,729.40

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Solution

The fourth proportional to 72,689,063.80, 109,033,595.70 and 52,281,729.40 is: 78,422,594.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,689,063.80 : 109,033,595.70 = 52,281,729.40 : x
  2. Step 2: Convert to fraction form
    72,689,063.80/109,033,595.70 = 52,281,729.40/x
  3. Step 3: Cross multiply
    72,689,063.80x = 109,033,595.70 × 52,281,729.40
  4. Step 4: Simplify right side
    72,689,063.80x = 5,700,464,945,896,404
  5. Step 5: Solve for x
    x = 5,700,464,945,896,404/72,689,063.80
  6. Step 6: Final answer
    x = 78,422,594.10

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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.