Home / 139,968,692.40-209,953,038.60-78,746,689.20

Finding the Fourth Proportional to 139,968,692.40, 209,953,038.60 and 78,746,689.20

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Solution

The fourth proportional to 139,968,692.40, 209,953,038.60 and 78,746,689.20 is: 118,120,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,692.40 : 209,953,038.60 = 78,746,689.20 : x
  2. Step 2: Convert to fraction form
    139,968,692.40/209,953,038.60 = 78,746,689.20/x
  3. Step 3: Cross multiply
    139,968,692.40x = 209,953,038.60 × 78,746,689.20
  4. Step 4: Simplify right side
    139,968,692.40x = 16,533,106,677,229,804
  5. Step 5: Solve for x
    x = 16,533,106,677,229,804/139,968,692.40
  6. Step 6: Final answer
    x = 118,120,033.80

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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.