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Finding the Fourth Proportional to 92,918.63, 128,248.12 and 61,090.49

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Solution

The fourth proportional to 92,918.63, 128,248.12 and 61,090.49 is: 84,318.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,918.63 : 128,248.12 = 61,090.49 : x
  2. Step 2: Convert to fraction form
    92,918.63/128,248.12 = 61,090.49/x
  3. Step 3: Cross multiply
    92,918.63x = 128,248.12 × 61,090.49
  4. Step 4: Simplify right side
    92,918.63x = 7,834,740,492.38
  5. Step 5: Solve for x
    x = 7,834,740,492.38/92,918.63
  6. Step 6: Final answer
    x = 84,318.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.