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Finding the Fourth Proportional to 61,685.48, 85,127.10 and 36,210.08

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Solution

The fourth proportional to 61,685.48, 85,127.10 and 36,210.08 is: 49,970.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,685.48 : 85,127.10 = 36,210.08 : x
  2. Step 2: Convert to fraction form
    61,685.48/85,127.10 = 36,210.08/x
  3. Step 3: Cross multiply
    61,685.48x = 85,127.10 × 36,210.08
  4. Step 4: Simplify right side
    61,685.48x = 3,082,459,101.17
  5. Step 5: Solve for x
    x = 3,082,459,101.17/61,685.48
  6. Step 6: Final answer
    x = 49,970.58

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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.