Home / 129,354.81-178,509.35-72,766.18

Finding the Fourth Proportional to 129,354.81, 178,509.35 and 72,766.18

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Solution

The fourth proportional to 129,354.81, 178,509.35 and 72,766.18 is: 100,417.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,354.81 : 178,509.35 = 72,766.18 : x
  2. Step 2: Convert to fraction form
    129,354.81/178,509.35 = 72,766.18/x
  3. Step 3: Cross multiply
    129,354.81x = 178,509.35 × 72,766.18
  4. Step 4: Simplify right side
    129,354.81x = 12,989,443,898.84
  5. Step 5: Solve for x
    x = 12,989,443,898.84/129,354.81
  6. Step 6: Final answer
    x = 100,417.17

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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.