Home / 139,968,678.90-209,953,018.35-78,746,675.70

Finding the Fourth Proportional to 139,968,678.90, 209,953,018.35 and 78,746,675.70

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Solution

The fourth proportional to 139,968,678.90, 209,953,018.35 and 78,746,675.70 is: 118,120,013.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,678.90 : 209,953,018.35 = 78,746,675.70 : x
  2. Step 2: Convert to fraction form
    139,968,678.90/209,953,018.35 = 78,746,675.70/x
  3. Step 3: Cross multiply
    139,968,678.90x = 209,953,018.35 × 78,746,675.70
  4. Step 4: Simplify right side
    139,968,678.90x = 16,533,102,248,243,600
  5. Step 5: Solve for x
    x = 16,533,102,248,243,600/139,968,678.90
  6. Step 6: Final answer
    x = 118,120,013.55

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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.