Home / 85,833,006.30-128,749,509.45-76,479,644.70

Finding the Fourth Proportional to 85,833,006.30, 128,749,509.45 and 76,479,644.70

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Solution

The fourth proportional to 85,833,006.30, 128,749,509.45 and 76,479,644.70 is: 114,719,467.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,833,006.30 : 128,749,509.45 = 76,479,644.70 : x
  2. Step 2: Convert to fraction form
    85,833,006.30/128,749,509.45 = 76,479,644.70/x
  3. Step 3: Cross multiply
    85,833,006.30x = 128,749,509.45 × 76,479,644.70
  4. Step 4: Simplify right side
    85,833,006.30x = 9,846,716,738,035,294
  5. Step 5: Solve for x
    x = 9,846,716,738,035,294/85,833,006.30
  6. Step 6: Final answer
    x = 114,719,467.05

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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.