Home / 85,577.64-128,367-56,020.28

Finding the Fourth Proportional to 85,577.64, 128,367 and 56,020.28

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Solution

The fourth proportional to 85,577.64, 128,367 and 56,020.28 is: 84,030.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,577.64 : 128,367 = 56,020.28 : x
  2. Step 2: Convert to fraction form
    85,577.64/128,367 = 56,020.28/x
  3. Step 3: Cross multiply
    85,577.64x = 128,367 × 56,020.28
  4. Step 4: Simplify right side
    85,577.64x = 7,191,155,282.76
  5. Step 5: Solve for x
    x = 7,191,155,282.76/85,577.64
  6. Step 6: Final answer
    x = 84,030.77

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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.