Home / 154,030.40-212,423.79-128,274.22

Finding the Fourth Proportional to 154,030.40, 212,423.79 and 128,274.22

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Solution

The fourth proportional to 154,030.40, 212,423.79 and 128,274.22 is: 176,903.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,030.40 : 212,423.79 = 128,274.22 : x
  2. Step 2: Convert to fraction form
    154,030.40/212,423.79 = 128,274.22/x
  3. Step 3: Cross multiply
    154,030.40x = 212,423.79 × 128,274.22
  4. Step 4: Simplify right side
    154,030.40x = 27,248,495,440.63
  5. Step 5: Solve for x
    x = 27,248,495,440.63/154,030.40
  6. Step 6: Final answer
    x = 176,903.37

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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.