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Finding the Fourth Proportional to 144,061.40, 215,816.70 and 77,479.40

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Solution

The fourth proportional to 144,061.40, 215,816.70 and 77,479.40 is: 116,070.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,061.40 : 215,816.70 = 77,479.40 : x
  2. Step 2: Convert to fraction form
    144,061.40/215,816.70 = 77,479.40/x
  3. Step 3: Cross multiply
    144,061.40x = 215,816.70 × 77,479.40
  4. Step 4: Simplify right side
    144,061.40x = 16,721,348,425.98
  5. Step 5: Solve for x
    x = 16,721,348,425.98/144,061.40
  6. Step 6: Final answer
    x = 116,070.98

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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.