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Finding the Fourth Proportional to 83,482.40, 115,256.40 and 64,666.40

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Solution

The fourth proportional to 83,482.40, 115,256.40 and 64,666.40 is: 89,278.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,482.40 : 115,256.40 = 64,666.40 : x
  2. Step 2: Convert to fraction form
    83,482.40/115,256.40 = 64,666.40/x
  3. Step 3: Cross multiply
    83,482.40x = 115,256.40 × 64,666.40
  4. Step 4: Simplify right side
    83,482.40x = 7,453,216,464.96
  5. Step 5: Solve for x
    x = 7,453,216,464.96/83,482.40
  6. Step 6: Final answer
    x = 89,278.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.