Home / 139,968,666.40-209,952,999.60-78,746,663.20

Finding the Fourth Proportional to 139,968,666.40, 209,952,999.60 and 78,746,663.20

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Solution

The fourth proportional to 139,968,666.40, 209,952,999.60 and 78,746,663.20 is: 118,119,994.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,666.40 : 209,952,999.60 = 78,746,663.20 : x
  2. Step 2: Convert to fraction form
    139,968,666.40/209,952,999.60 = 78,746,663.20/x
  3. Step 3: Cross multiply
    139,968,666.40x = 209,952,999.60 × 78,746,663.20
  4. Step 4: Simplify right side
    139,968,666.40x = 16,533,098,147,330,934
  5. Step 5: Solve for x
    x = 16,533,098,147,330,934/139,968,666.40
  6. Step 6: Final answer
    x = 118,119,994.80

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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.