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Finding the Fourth Proportional to 93,288.20, 139,932.30 and 85,123.40

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Solution

The fourth proportional to 93,288.20, 139,932.30 and 85,123.40 is: 127,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,288.20 : 139,932.30 = 85,123.40 : x
  2. Step 2: Convert to fraction form
    93,288.20/139,932.30 = 85,123.40/x
  3. Step 3: Cross multiply
    93,288.20x = 139,932.30 × 85,123.40
  4. Step 4: Simplify right side
    93,288.20x = 11,911,513,145.82
  5. Step 5: Solve for x
    x = 11,911,513,145.82/93,288.20
  6. Step 6: Final answer
    x = 127,685.10

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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.