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Finding the Fourth Proportional to 93,309.80, 139,964.70 and 91,999.40

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Solution

The fourth proportional to 93,309.80, 139,964.70 and 91,999.40 is: 137,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,309.80 : 139,964.70 = 91,999.40 : x
  2. Step 2: Convert to fraction form
    93,309.80/139,964.70 = 91,999.40/x
  3. Step 3: Cross multiply
    93,309.80x = 139,964.70 × 91,999.40
  4. Step 4: Simplify right side
    93,309.80x = 12,876,668,421.18
  5. Step 5: Solve for x
    x = 12,876,668,421.18/93,309.80
  6. Step 6: Final answer
    x = 137,999.10

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1.5x scale

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.