Home / 142,167.47-212,329.40-128,813.76

Finding the Fourth Proportional to 142,167.47, 212,329.40 and 128,813.76

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Solution

The fourth proportional to 142,167.47, 212,329.40 and 128,813.76 is: 192,385.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,167.47 : 212,329.40 = 128,813.76 : x
  2. Step 2: Convert to fraction form
    142,167.47/212,329.40 = 128,813.76/x
  3. Step 3: Cross multiply
    142,167.47x = 212,329.40 × 128,813.76
  4. Step 4: Simplify right side
    142,167.47x = 27,350,947,728.48
  5. Step 5: Solve for x
    x = 27,350,947,728.48/142,167.47
  6. Step 6: Final answer
    x = 192,385.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.