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Finding the Fourth Proportional to 76,637.80, 114,956.70 and 64,390.60

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Solution

The fourth proportional to 76,637.80, 114,956.70 and 64,390.60 is: 96,585.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,637.80 : 114,956.70 = 64,390.60 : x
  2. Step 2: Convert to fraction form
    76,637.80/114,956.70 = 64,390.60/x
  3. Step 3: Cross multiply
    76,637.80x = 114,956.70 × 64,390.60
  4. Step 4: Simplify right side
    76,637.80x = 7,402,130,887.02
  5. Step 5: Solve for x
    x = 7,402,130,887.02/76,637.80
  6. Step 6: Final answer
    x = 96,585.90

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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.