Home / 142,070.10-213,202.35-78,890.10

Finding the Fourth Proportional to 142,070.10, 213,202.35 and 78,890.10

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Solution

The fourth proportional to 142,070.10, 213,202.35 and 78,890.10 is: 118,389.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,070.10 : 213,202.35 = 78,890.10 : x
  2. Step 2: Convert to fraction form
    142,070.10/213,202.35 = 78,890.10/x
  3. Step 3: Cross multiply
    142,070.10x = 213,202.35 × 78,890.10
  4. Step 4: Simplify right side
    142,070.10x = 16,819,554,711.74
  5. Step 5: Solve for x
    x = 16,819,554,711.74/142,070.10
  6. Step 6: Final answer
    x = 118,389.12

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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.