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Finding the Fourth Proportional to 70,907.60, 106,447.80 and 70,389.20

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Solution

The fourth proportional to 70,907.60, 106,447.80 and 70,389.20 is: 105,669.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,907.60 : 106,447.80 = 70,389.20 : x
  2. Step 2: Convert to fraction form
    70,907.60/106,447.80 = 70,389.20/x
  3. Step 3: Cross multiply
    70,907.60x = 106,447.80 × 70,389.20
  4. Step 4: Simplify right side
    70,907.60x = 7,492,775,483.76
  5. Step 5: Solve for x
    x = 7,492,775,483.76/70,907.60
  6. Step 6: Final answer
    x = 105,669.57

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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.