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Finding the Fourth Proportional to 78,499.60, 117,749.40 and 64,592.35

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Solution

The fourth proportional to 78,499.60, 117,749.40 and 64,592.35 is: 96,888.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,499.60 : 117,749.40 = 64,592.35 : x
  2. Step 2: Convert to fraction form
    78,499.60/117,749.40 = 64,592.35/x
  3. Step 3: Cross multiply
    78,499.60x = 117,749.40 × 64,592.35
  4. Step 4: Simplify right side
    78,499.60x = 7,605,710,457.09
  5. Step 5: Solve for x
    x = 7,605,710,457.09/78,499.60
  6. Step 6: Final answer
    x = 96,888.53

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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.