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Finding the Fourth Proportional to 115,315.20, 172,972.80 and 101,030.40

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Solution

The fourth proportional to 115,315.20, 172,972.80 and 101,030.40 is: 151,545.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,315.20 : 172,972.80 = 101,030.40 : x
  2. Step 2: Convert to fraction form
    115,315.20/172,972.80 = 101,030.40/x
  3. Step 3: Cross multiply
    115,315.20x = 172,972.80 × 101,030.40
  4. Step 4: Simplify right side
    115,315.20x = 17,475,511,173.12
  5. Step 5: Solve for x
    x = 17,475,511,173.12/115,315.20
  6. Step 6: Final answer
    x = 151,545.60

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1.5x scale

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.