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Finding the Fourth Proportional to 121,437.40, 182,156.10 and 105,885.40

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Solution

The fourth proportional to 121,437.40, 182,156.10 and 105,885.40 is: 158,828.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,437.40 : 182,156.10 = 105,885.40 : x
  2. Step 2: Convert to fraction form
    121,437.40/182,156.10 = 105,885.40/x
  3. Step 3: Cross multiply
    121,437.40x = 182,156.10 × 105,885.40
  4. Step 4: Simplify right side
    121,437.40x = 19,287,671,510.94
  5. Step 5: Solve for x
    x = 19,287,671,510.94/121,437.40
  6. Step 6: Final answer
    x = 158,828.10

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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.