Home / 120,693.48-181,159.40-90,603.10

Finding the Fourth Proportional to 120,693.48, 181,159.40 and 90,603.10

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Solution

The fourth proportional to 120,693.48, 181,159.40 and 90,603.10 is: 135,994.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,693.48 : 181,159.40 = 90,603.10 : x
  2. Step 2: Convert to fraction form
    120,693.48/181,159.40 = 90,603.10/x
  3. Step 3: Cross multiply
    120,693.48x = 181,159.40 × 90,603.10
  4. Step 4: Simplify right side
    120,693.48x = 16,413,602,328.31
  5. Step 5: Solve for x
    x = 16,413,602,328.31/120,693.48
  6. Step 6: Final answer
    x = 135,994.11

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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.