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Finding the Fourth Proportional to 125,045.16, 172,578.74 and 71,317.86

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Solution

The fourth proportional to 125,045.16, 172,578.74 and 71,317.86 is: 98,428.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,045.16 : 172,578.74 = 71,317.86 : x
  2. Step 2: Convert to fraction form
    125,045.16/172,578.74 = 71,317.86/x
  3. Step 3: Cross multiply
    125,045.16x = 172,578.74 × 71,317.86
  4. Step 4: Simplify right side
    125,045.16x = 12,307,945,555.40
  5. Step 5: Solve for x
    x = 12,307,945,555.40/125,045.16
  6. Step 6: Final answer
    x = 98,428.01

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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.