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Finding the Fourth Proportional to 64,754,946.80, 97,119,978.60 and 19,318,223.60

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Solution

The fourth proportional to 64,754,946.80, 97,119,978.60 and 19,318,223.60 is: 28,973,623.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,754,946.80 : 97,119,978.60 = 19,318,223.60 : x
  2. Step 2: Convert to fraction form
    64,754,946.80/97,119,978.60 = 19,318,223.60/x
  3. Step 3: Cross multiply
    64,754,946.80x = 97,119,978.60 × 19,318,223.60
  4. Step 4: Simplify right side
    64,754,946.80x = 1,876,185,462,622,015
  5. Step 5: Solve for x
    x = 1,876,185,462,622,015/64,754,946.80
  6. Step 6: Final answer
    x = 28,973,623.72

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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.