Home / 129,681.61-178,957.06-72,322.68

Finding the Fourth Proportional to 129,681.61, 178,957.06 and 72,322.68

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Solution

The fourth proportional to 129,681.61, 178,957.06 and 72,322.68 is: 99,803.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,681.61 : 178,957.06 = 72,322.68 : x
  2. Step 2: Convert to fraction form
    129,681.61/178,957.06 = 72,322.68/x
  3. Step 3: Cross multiply
    129,681.61x = 178,957.06 × 72,322.68
  4. Step 4: Simplify right side
    129,681.61x = 12,942,654,184.12
  5. Step 5: Solve for x
    x = 12,942,654,184.12/129,681.61
  6. Step 6: Final answer
    x = 99,803.31

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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.