Home / 85,865,416.80-128,947,424.40-45,554,632.80

Finding the Fourth Proportional to 85,865,416.80, 128,947,424.40 and 45,554,632.80

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Solution

The fourth proportional to 85,865,416.80, 128,947,424.40 and 45,554,632.80 is: 68,411,157.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,865,416.80 : 128,947,424.40 = 45,554,632.80 : x
  2. Step 2: Convert to fraction form
    85,865,416.80/128,947,424.40 = 45,554,632.80/x
  3. Step 3: Cross multiply
    85,865,416.80x = 128,947,424.40 × 45,554,632.80
  4. Step 4: Simplify right side
    85,865,416.80x = 5,874,152,569,047,760
  5. Step 5: Solve for x
    x = 5,874,152,569,047,760/85,865,416.80
  6. Step 6: Final answer
    x = 68,411,157.69

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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.