Home / 139,968,678.60-209,953,017.90-78,746,675.40

Finding the Fourth Proportional to 139,968,678.60, 209,953,017.90 and 78,746,675.40

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Solution

The fourth proportional to 139,968,678.60, 209,953,017.90 and 78,746,675.40 is: 118,120,013.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,678.60 : 209,953,017.90 = 78,746,675.40 : x
  2. Step 2: Convert to fraction form
    139,968,678.60/209,953,017.90 = 78,746,675.40/x
  3. Step 3: Cross multiply
    139,968,678.60x = 209,953,017.90 × 78,746,675.40
  4. Step 4: Simplify right side
    139,968,678.60x = 16,533,102,149,821,692
  5. Step 5: Solve for x
    x = 16,533,102,149,821,692/139,968,678.60
  6. Step 6: Final answer
    x = 118,120,013.10

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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.