Home / 139,968,015.40-209,952,023.10-78,746,012.20

Finding the Fourth Proportional to 139,968,015.40, 209,952,023.10 and 78,746,012.20

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Solution

The fourth proportional to 139,968,015.40, 209,952,023.10 and 78,746,012.20 is: 118,119,018.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,015.40 : 209,952,023.10 = 78,746,012.20 : x
  2. Step 2: Convert to fraction form
    139,968,015.40/209,952,023.10 = 78,746,012.20/x
  3. Step 3: Cross multiply
    139,968,015.40x = 209,952,023.10 × 78,746,012.20
  4. Step 4: Simplify right side
    139,968,015.40x = 16,532,884,572,447,282
  5. Step 5: Solve for x
    x = 16,532,884,572,447,282/139,968,015.40
  6. Step 6: Final answer
    x = 118,119,018.30

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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.