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Finding the Fourth Proportional to 93,298.40, 139,947.60 and 86,008.40

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Solution

The fourth proportional to 93,298.40, 139,947.60 and 86,008.40 is: 129,012.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,298.40 : 139,947.60 = 86,008.40 : x
  2. Step 2: Convert to fraction form
    93,298.40/139,947.60 = 86,008.40/x
  3. Step 3: Cross multiply
    93,298.40x = 139,947.60 × 86,008.40
  4. Step 4: Simplify right side
    93,298.40x = 12,036,669,159.84
  5. Step 5: Solve for x
    x = 12,036,669,159.84/93,298.40
  6. Step 6: Final answer
    x = 129,012.60

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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.