Home / 76,739.04-105,688.08-66,124.80

Finding the Fourth Proportional to 76,739.04, 105,688.08 and 66,124.80

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Solution

The fourth proportional to 76,739.04, 105,688.08 and 66,124.80 is: 91,069.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,739.04 : 105,688.08 = 66,124.80 : x
  2. Step 2: Convert to fraction form
    76,739.04/105,688.08 = 66,124.80/x
  3. Step 3: Cross multiply
    76,739.04x = 105,688.08 × 66,124.80
  4. Step 4: Simplify right side
    76,739.04x = 6,988,603,152.38
  5. Step 5: Solve for x
    x = 6,988,603,152.38/76,739.04
  6. Step 6: Final answer
    x = 91,069.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.