Home / 139,372,805.16-209,087,113.86-78,049,172.04

Finding the Fourth Proportional to 139,372,805.16, 209,087,113.86 and 78,049,172.04

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Solution

The fourth proportional to 139,372,805.16, 209,087,113.86 and 78,049,172.04 is: 117,089,385.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,372,805.16 : 209,087,113.86 = 78,049,172.04 : x
  2. Step 2: Convert to fraction form
    139,372,805.16/209,087,113.86 = 78,049,172.04/x
  3. Step 3: Cross multiply
    139,372,805.16x = 209,087,113.86 × 78,049,172.04
  4. Step 4: Simplify right side
    139,372,805.16x = 16,319,076,121,006,210
  5. Step 5: Solve for x
    x = 16,319,076,121,006,210/139,372,805.16
  6. Step 6: Final answer
    x = 117,089,385.57

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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.