Home / 85,931,982.41-128,896,711.43-21,235,785.93

Finding the Fourth Proportional to 85,931,982.41, 128,896,711.43 and 21,235,785.93

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Solution

The fourth proportional to 85,931,982.41, 128,896,711.43 and 21,235,785.93 is: 31,853,366.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,931,982.41 : 128,896,711.43 = 21,235,785.93 : x
  2. Step 2: Convert to fraction form
    85,931,982.41/128,896,711.43 = 21,235,785.93/x
  3. Step 3: Cross multiply
    85,931,982.41x = 128,896,711.43 × 21,235,785.93
  4. Step 4: Simplify right side
    85,931,982.41x = 2,737,222,970,902,285
  5. Step 5: Solve for x
    x = 2,737,222,970,902,285/85,931,982.41
  6. Step 6: Final answer
    x = 31,853,366.98

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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.