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Finding the Fourth Proportional to 92,938.32, 139,465.80 and 86,960.52

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Solution

The fourth proportional to 92,938.32, 139,465.80 and 86,960.52 is: 130,495.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,938.32 : 139,465.80 = 86,960.52 : x
  2. Step 2: Convert to fraction form
    92,938.32/139,465.80 = 86,960.52/x
  3. Step 3: Cross multiply
    92,938.32x = 139,465.80 × 86,960.52
  4. Step 4: Simplify right side
    92,938.32x = 12,128,018,490.22
  5. Step 5: Solve for x
    x = 12,128,018,490.22/92,938.32
  6. Step 6: Final answer
    x = 130,495.35

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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.