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Finding the Fourth Proportional to 125,312.16, 172,933.20 and 68,720.16

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Solution

The fourth proportional to 125,312.16, 172,933.20 and 68,720.16 is: 94,835.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,312.16 : 172,933.20 = 68,720.16 : x
  2. Step 2: Convert to fraction form
    125,312.16/172,933.20 = 68,720.16/x
  3. Step 3: Cross multiply
    125,312.16x = 172,933.20 × 68,720.16
  4. Step 4: Simplify right side
    125,312.16x = 11,883,997,173.31
  5. Step 5: Solve for x
    x = 11,883,997,173.31/125,312.16
  6. Step 6: Final answer
    x = 94,835.15

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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.