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Finding the Fourth Proportional to 139,968,688.80, 209,953,033.20 and 101,421,501.60

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Solution

The fourth proportional to 139,968,688.80, 209,953,033.20 and 101,421,501.60 is: 152,132,252.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,688.80 : 209,953,033.20 = 101,421,501.60 : x
  2. Step 2: Convert to fraction form
    139,968,688.80/209,953,033.20 = 101,421,501.60/x
  3. Step 3: Cross multiply
    139,968,688.80x = 209,953,033.20 × 101,421,501.60
  4. Step 4: Simplify right side
    139,968,688.80x = 21,293,751,892,618,652
  5. Step 5: Solve for x
    x = 21,293,751,892,618,652/139,968,688.80
  6. Step 6: Final answer
    x = 152,132,252.40

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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.