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Finding the Fourth Proportional to 93,374.40, 139,802.40 and 90,782.40

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Solution

The fourth proportional to 93,374.40, 139,802.40 and 90,782.40 is: 135,921.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,374.40 : 139,802.40 = 90,782.40 : x
  2. Step 2: Convert to fraction form
    93,374.40/139,802.40 = 90,782.40/x
  3. Step 3: Cross multiply
    93,374.40x = 139,802.40 × 90,782.40
  4. Step 4: Simplify right side
    93,374.40x = 12,691,597,397.76
  5. Step 5: Solve for x
    x = 12,691,597,397.76/93,374.40
  6. Step 6: Final answer
    x = 135,921.60

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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.