Home / 70,390.18-105,420.57-61,106.50

Finding the Fourth Proportional to 70,390.18, 105,420.57 and 61,106.50

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Solution

The fourth proportional to 70,390.18, 105,420.57 and 61,106.50 is: 91,516.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,390.18 : 105,420.57 = 61,106.50 : x
  2. Step 2: Convert to fraction form
    70,390.18/105,420.57 = 61,106.50/x
  3. Step 3: Cross multiply
    70,390.18x = 105,420.57 × 61,106.50
  4. Step 4: Simplify right side
    70,390.18x = 6,441,882,060.71
  5. Step 5: Solve for x
    x = 6,441,882,060.71/70,390.18
  6. Step 6: Final answer
    x = 91,516.77

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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.