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Finding the Fourth Proportional to 93,002.40, 139,503.60 and 81,921.60

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Solution

The fourth proportional to 93,002.40, 139,503.60 and 81,921.60 is: 122,882.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,002.40 : 139,503.60 = 81,921.60 : x
  2. Step 2: Convert to fraction form
    93,002.40/139,503.60 = 81,921.60/x
  3. Step 3: Cross multiply
    93,002.40x = 139,503.60 × 81,921.60
  4. Step 4: Simplify right side
    93,002.40x = 11,428,358,117.76
  5. Step 5: Solve for x
    x = 11,428,358,117.76/93,002.40
  6. Step 6: Final answer
    x = 122,882.40

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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.