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Finding the Fourth Proportional to 86,938,693.20, 130,408,039.80 and 65,255,900.40

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Solution

The fourth proportional to 86,938,693.20, 130,408,039.80 and 65,255,900.40 is: 97,883,850.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,938,693.20 : 130,408,039.80 = 65,255,900.40 : x
  2. Step 2: Convert to fraction form
    86,938,693.20/130,408,039.80 = 65,255,900.40/x
  3. Step 3: Cross multiply
    86,938,693.20x = 130,408,039.80 × 65,255,900.40
  4. Step 4: Simplify right side
    86,938,693.20x = 8,509,894,056,548,036
  5. Step 5: Solve for x
    x = 8,509,894,056,548,036/86,938,693.20
  6. Step 6: Final answer
    x = 97,883,850.60

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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.