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Finding the Fourth Proportional to 85,718.04, 128,575.86 and 83,600.28

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Solution

The fourth proportional to 85,718.04, 128,575.86 and 83,600.28 is: 125,399.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,718.04 : 128,575.86 = 83,600.28 : x
  2. Step 2: Convert to fraction form
    85,718.04/128,575.86 = 83,600.28/x
  3. Step 3: Cross multiply
    85,718.04x = 128,575.86 × 83,600.28
  4. Step 4: Simplify right side
    85,718.04x = 10,748,977,897.24
  5. Step 5: Solve for x
    x = 10,748,977,897.24/85,718.04
  6. Step 6: Final answer
    x = 125,399.25

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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.