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Finding the Fourth Proportional to 153,970.71, 212,683.58 and 123,869.40

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Solution

The fourth proportional to 153,970.71, 212,683.58 and 123,869.40 is: 171,103.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,970.71 : 212,683.58 = 123,869.40 : x
  2. Step 2: Convert to fraction form
    153,970.71/212,683.58 = 123,869.40/x
  3. Step 3: Cross multiply
    153,970.71x = 212,683.58 × 123,869.40
  4. Step 4: Simplify right side
    153,970.71x = 26,344,987,444.45
  5. Step 5: Solve for x
    x = 26,344,987,444.45/153,970.71
  6. Step 6: Final answer
    x = 171,103.89

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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.