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Finding the Fourth Proportional to 78,009.60, 116,752.32 and 64,888.32

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Solution

The fourth proportional to 78,009.60, 116,752.32 and 64,888.32 is: 97,114.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,009.60 : 116,752.32 = 64,888.32 : x
  2. Step 2: Convert to fraction form
    78,009.60/116,752.32 = 64,888.32/x
  3. Step 3: Cross multiply
    78,009.60x = 116,752.32 × 64,888.32
  4. Step 4: Simplify right side
    78,009.60x = 7,575,861,900.90
  5. Step 5: Solve for x
    x = 7,575,861,900.90/78,009.60
  6. Step 6: Final answer
    x = 97,114.48

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1.5x scale

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.