Home / 289,663,619.40-434,495,429.10-85,212,361.80

Finding the Fourth Proportional to 289,663,619.40, 434,495,429.10 and 85,212,361.80

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Solution

The fourth proportional to 289,663,619.40, 434,495,429.10 and 85,212,361.80 is: 127,818,542.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,663,619.40 : 434,495,429.10 = 85,212,361.80 : x
  2. Step 2: Convert to fraction form
    289,663,619.40/434,495,429.10 = 85,212,361.80/x
  3. Step 3: Cross multiply
    289,663,619.40x = 434,495,429.10 × 85,212,361.80
  4. Step 4: Simplify right side
    289,663,619.40x = 37,024,381,704,915,448
  5. Step 5: Solve for x
    x = 37,024,381,704,915,448/289,663,619.40
  6. Step 6: Final answer
    x = 127,818,542.70

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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.