Home / 154,030.90-212,424.48-128,274.72

Finding the Fourth Proportional to 154,030.90, 212,424.48 and 128,274.72

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Solution

The fourth proportional to 154,030.90, 212,424.48 and 128,274.72 is: 176,904.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,030.90 : 212,424.48 = 128,274.72 : x
  2. Step 2: Convert to fraction form
    154,030.90/212,424.48 = 128,274.72/x
  3. Step 3: Cross multiply
    154,030.90x = 212,424.48 × 128,274.72
  4. Step 4: Simplify right side
    154,030.90x = 27,248,690,693.15
  5. Step 5: Solve for x
    x = 27,248,690,693.15/154,030.90
  6. Step 6: Final answer
    x = 176,904.05

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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.