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Finding the Fourth Proportional to 101,428.12, 139,985.46 and 59,010.04

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Solution

The fourth proportional to 101,428.12, 139,985.46 and 59,010.04 is: 81,442.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,428.12 : 139,985.46 = 59,010.04 : x
  2. Step 2: Convert to fraction form
    101,428.12/139,985.46 = 59,010.04/x
  3. Step 3: Cross multiply
    101,428.12x = 139,985.46 × 59,010.04
  4. Step 4: Simplify right side
    101,428.12x = 8,260,547,594.02
  5. Step 5: Solve for x
    x = 8,260,547,594.02/101,428.12
  6. Step 6: Final answer
    x = 81,442.38

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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.