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Finding the Fourth Proportional to 91,771.70, 137,657.55 and 56,779.70

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Solution

The fourth proportional to 91,771.70, 137,657.55 and 56,779.70 is: 85,169.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,771.70 : 137,657.55 = 56,779.70 : x
  2. Step 2: Convert to fraction form
    91,771.70/137,657.55 = 56,779.70/x
  3. Step 3: Cross multiply
    91,771.70x = 137,657.55 × 56,779.70
  4. Step 4: Simplify right side
    91,771.70x = 7,816,154,391.74
  5. Step 5: Solve for x
    x = 7,816,154,391.74/91,771.70
  6. Step 6: Final answer
    x = 85,169.55

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1.5x scale

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.