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Finding the Fourth Proportional to 93,312,781.80, 139,969,172.70 and 78,196,237.80

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Solution

The fourth proportional to 93,312,781.80, 139,969,172.70 and 78,196,237.80 is: 117,294,356.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,312,781.80 : 139,969,172.70 = 78,196,237.80 : x
  2. Step 2: Convert to fraction form
    93,312,781.80/139,969,172.70 = 78,196,237.80/x
  3. Step 3: Cross multiply
    93,312,781.80x = 139,969,172.70 × 78,196,237.80
  4. Step 4: Simplify right side
    93,312,781.80x = 10,945,062,713,118,466
  5. Step 5: Solve for x
    x = 10,945,062,713,118,466/93,312,781.80
  6. Step 6: Final answer
    x = 117,294,356.70

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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.