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Finding the Fourth Proportional to 93,308.60, 139,962.90 and 76,687.40

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Solution

The fourth proportional to 93,308.60, 139,962.90 and 76,687.40 is: 115,031.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,308.60 : 139,962.90 = 76,687.40 : x
  2. Step 2: Convert to fraction form
    93,308.60/139,962.90 = 76,687.40/x
  3. Step 3: Cross multiply
    93,308.60x = 139,962.90 × 76,687.40
  4. Step 4: Simplify right side
    93,308.60x = 10,733,390,897.46
  5. Step 5: Solve for x
    x = 10,733,390,897.46/93,308.60
  6. Step 6: Final answer
    x = 115,031.10

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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.