Home / 129,646.16-178,895.56-72,271.40

Finding the Fourth Proportional to 129,646.16, 178,895.56 and 72,271.40

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Solution

The fourth proportional to 129,646.16, 178,895.56 and 72,271.40 is: 99,725.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,646.16 : 178,895.56 = 72,271.40 : x
  2. Step 2: Convert to fraction form
    129,646.16/178,895.56 = 72,271.40/x
  3. Step 3: Cross multiply
    129,646.16x = 178,895.56 × 72,271.40
  4. Step 4: Simplify right side
    129,646.16x = 12,929,032,574.98
  5. Step 5: Solve for x
    x = 12,929,032,574.98/129,646.16
  6. Step 6: Final answer
    x = 99,725.53

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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.