Home / 139,968,009.40-209,952,014.10-78,746,006.20

Finding the Fourth Proportional to 139,968,009.40, 209,952,014.10 and 78,746,006.20

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Solution

The fourth proportional to 139,968,009.40, 209,952,014.10 and 78,746,006.20 is: 118,119,009.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,009.40 : 209,952,014.10 = 78,746,006.20 : x
  2. Step 2: Convert to fraction form
    139,968,009.40/209,952,014.10 = 78,746,006.20/x
  3. Step 3: Cross multiply
    139,968,009.40x = 209,952,014.10 × 78,746,006.20
  4. Step 4: Simplify right side
    139,968,009.40x = 16,532,882,604,021,088
  5. Step 5: Solve for x
    x = 16,532,882,604,021,088/139,968,009.40
  6. Step 6: Final answer
    x = 118,119,009.30

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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.