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Finding the Fourth Proportional to 125,712, 173,482.56 and 75,427.20

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Solution

The fourth proportional to 125,712, 173,482.56 and 75,427.20 is: 104,089.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,712 : 173,482.56 = 75,427.20 : x
  2. Step 2: Convert to fraction form
    125,712/173,482.56 = 75,427.20/x
  3. Step 3: Cross multiply
    125,712x = 173,482.56 × 75,427.20
  4. Step 4: Simplify right side
    125,712x = 13,085,303,749.63
  5. Step 5: Solve for x
    x = 13,085,303,749.63/125,712
  6. Step 6: Final answer
    x = 104,089.54

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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.