Home / 76,780.16-105,896.40-49,931.36

Finding the Fourth Proportional to 76,780.16, 105,896.40 and 49,931.36

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Solution

The fourth proportional to 76,780.16, 105,896.40 and 49,931.36 is: 68,866.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,780.16 : 105,896.40 = 49,931.36 : x
  2. Step 2: Convert to fraction form
    76,780.16/105,896.40 = 49,931.36/x
  3. Step 3: Cross multiply
    76,780.16x = 105,896.40 × 49,931.36
  4. Step 4: Simplify right side
    76,780.16x = 5,287,551,271.10
  5. Step 5: Solve for x
    x = 5,287,551,271.10/76,780.16
  6. Step 6: Final answer
    x = 68,866.11

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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.