Home / 139,968,505.40-209,952,758.10-78,746,502.20

Finding the Fourth Proportional to 139,968,505.40, 209,952,758.10 and 78,746,502.20

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Solution

The fourth proportional to 139,968,505.40, 209,952,758.10 and 78,746,502.20 is: 118,119,753.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,505.40 : 209,952,758.10 = 78,746,502.20 : x
  2. Step 2: Convert to fraction form
    139,968,505.40/209,952,758.10 = 78,746,502.20/x
  3. Step 3: Cross multiply
    139,968,505.40x = 209,952,758.10 × 78,746,502.20
  4. Step 4: Simplify right side
    139,968,505.40x = 16,533,045,327,617,718
  5. Step 5: Solve for x
    x = 16,533,045,327,617,718/139,968,505.40
  6. Step 6: Final answer
    x = 118,119,753.30

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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.