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Finding the Fourth Proportional to 125,223.12, 172,822.14 and 71,515.80

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Solution

The fourth proportional to 125,223.12, 172,822.14 and 71,515.80 is: 98,699.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,223.12 : 172,822.14 = 71,515.80 : x
  2. Step 2: Convert to fraction form
    125,223.12/172,822.14 = 71,515.80/x
  3. Step 3: Cross multiply
    125,223.12x = 172,822.14 × 71,515.80
  4. Step 4: Simplify right side
    125,223.12x = 12,359,513,599.81
  5. Step 5: Solve for x
    x = 12,359,513,599.81/125,223.12
  6. Step 6: Final answer
    x = 98,699.93

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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.