Home / 81,031.60-121,547.40-34,278.40

Finding the Fourth Proportional to 81,031.60, 121,547.40 and 34,278.40

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Solution

The fourth proportional to 81,031.60, 121,547.40 and 34,278.40 is: 51,417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,031.60 : 121,547.40 = 34,278.40 : x
  2. Step 2: Convert to fraction form
    81,031.60/121,547.40 = 34,278.40/x
  3. Step 3: Cross multiply
    81,031.60x = 121,547.40 × 34,278.40
  4. Step 4: Simplify right side
    81,031.60x = 4,166,450,396.16
  5. Step 5: Solve for x
    x = 4,166,450,396.16/81,031.60
  6. Step 6: Final answer
    x = 51,417.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.