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Finding the Fourth Proportional to 76,953.70, 115,430.55 and 72,652.90

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Solution

The fourth proportional to 76,953.70, 115,430.55 and 72,652.90 is: 108,979.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,953.70 : 115,430.55 = 72,652.90 : x
  2. Step 2: Convert to fraction form
    76,953.70/115,430.55 = 72,652.90/x
  3. Step 3: Cross multiply
    76,953.70x = 115,430.55 × 72,652.90
  4. Step 4: Simplify right side
    76,953.70x = 8,386,364,206.10
  5. Step 5: Solve for x
    x = 8,386,364,206.10/76,953.70
  6. Step 6: Final answer
    x = 108,979.35

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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.