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Finding the Fourth Proportional to 78,667.60, 118,001.40 and 77,501.20

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Solution

The fourth proportional to 78,667.60, 118,001.40 and 77,501.20 is: 116,251.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,667.60 : 118,001.40 = 77,501.20 : x
  2. Step 2: Convert to fraction form
    78,667.60/118,001.40 = 77,501.20/x
  3. Step 3: Cross multiply
    78,667.60x = 118,001.40 × 77,501.20
  4. Step 4: Simplify right side
    78,667.60x = 9,145,250,101.68
  5. Step 5: Solve for x
    x = 9,145,250,101.68/78,667.60
  6. Step 6: Final answer
    x = 116,251.80

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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.