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Finding the Fourth Proportional to 180,628.55, 249,031.07 and 155,405.84

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Solution

The fourth proportional to 180,628.55, 249,031.07 and 155,405.84 is: 214,256.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,628.55 : 249,031.07 = 155,405.84 : x
  2. Step 2: Convert to fraction form
    180,628.55/249,031.07 = 155,405.84/x
  3. Step 3: Cross multiply
    180,628.55x = 249,031.07 × 155,405.84
  4. Step 4: Simplify right side
    180,628.55x = 38,700,882,619.45
  5. Step 5: Solve for x
    x = 38,700,882,619.45/180,628.55
  6. Step 6: Final answer
    x = 214,256.74

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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.