Home / 139,969,069.20-209,953,603.80-78,495,123.60

Finding the Fourth Proportional to 139,969,069.20, 209,953,603.80 and 78,495,123.60

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Solution

The fourth proportional to 139,969,069.20, 209,953,603.80 and 78,495,123.60 is: 117,742,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,069.20 : 209,953,603.80 = 78,495,123.60 : x
  2. Step 2: Convert to fraction form
    139,969,069.20/209,953,603.80 = 78,495,123.60/x
  3. Step 3: Cross multiply
    139,969,069.20x = 209,953,603.80 × 78,495,123.60
  4. Step 4: Simplify right side
    139,969,069.20x = 16,480,334,080,546,430
  5. Step 5: Solve for x
    x = 16,480,334,080,546,430/139,969,069.20
  6. Step 6: Final answer
    x = 117,742,685.40

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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.