Home / 289,038.20-433,557.30-78,675.80

Finding the Fourth Proportional to 289,038.20, 433,557.30 and 78,675.80

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Solution

The fourth proportional to 289,038.20, 433,557.30 and 78,675.80 is: 118,013.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,038.20 : 433,557.30 = 78,675.80 : x
  2. Step 2: Convert to fraction form
    289,038.20/433,557.30 = 78,675.80/x
  3. Step 3: Cross multiply
    289,038.20x = 433,557.30 × 78,675.80
  4. Step 4: Simplify right side
    289,038.20x = 34,110,467,423.34
  5. Step 5: Solve for x
    x = 34,110,467,423.34/289,038.20
  6. Step 6: Final answer
    x = 118,013.70

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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.