Home / 129,465.64-178,660.02-72,875.80

Finding the Fourth Proportional to 129,465.64, 178,660.02 and 72,875.80

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Solution

The fourth proportional to 129,465.64, 178,660.02 and 72,875.80 is: 100,567.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,465.64 : 178,660.02 = 72,875.80 : x
  2. Step 2: Convert to fraction form
    129,465.64/178,660.02 = 72,875.80/x
  3. Step 3: Cross multiply
    129,465.64x = 178,660.02 × 72,875.80
  4. Step 4: Simplify right side
    129,465.64x = 13,019,991,885.52
  5. Step 5: Solve for x
    x = 13,019,991,885.52/129,465.64
  6. Step 6: Final answer
    x = 100,567.16

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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.