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Finding the Fourth Proportional to 115,957.68, 160,017.12 and 65,656.80

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Solution

The fourth proportional to 115,957.68, 160,017.12 and 65,656.80 is: 90,603.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,957.68 : 160,017.12 = 65,656.80 : x
  2. Step 2: Convert to fraction form
    115,957.68/160,017.12 = 65,656.80/x
  3. Step 3: Cross multiply
    115,957.68x = 160,017.12 × 65,656.80
  4. Step 4: Simplify right side
    115,957.68x = 10,506,212,044.42
  5. Step 5: Solve for x
    x = 10,506,212,044.42/115,957.68
  6. Step 6: Final answer
    x = 90,603.85

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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.