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Finding the Fourth Proportional to 85,666.64, 128,430.68 and 35,784.94

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Solution

The fourth proportional to 85,666.64, 128,430.68 and 35,784.94 is: 53,648.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,666.64 : 128,430.68 = 35,784.94 : x
  2. Step 2: Convert to fraction form
    85,666.64/128,430.68 = 35,784.94/x
  3. Step 3: Cross multiply
    85,666.64x = 128,430.68 × 35,784.94
  4. Step 4: Simplify right side
    85,666.64x = 4,595,884,177.96
  5. Step 5: Solve for x
    x = 4,595,884,177.96/85,666.64
  6. Step 6: Final answer
    x = 53,648.47

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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.