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Finding the Fourth Proportional to 72,612.67, 108,377.28 and 70,840.93

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Solution

The fourth proportional to 72,612.67, 108,377.28 and 70,840.93 is: 105,732.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612.67 : 108,377.28 = 70,840.93 : x
  2. Step 2: Convert to fraction form
    72,612.67/108,377.28 = 70,840.93/x
  3. Step 3: Cross multiply
    72,612.67x = 108,377.28 × 70,840.93
  4. Step 4: Simplify right side
    72,612.67x = 7,677,547,306.07
  5. Step 5: Solve for x
    x = 7,677,547,306.07/72,612.67
  6. Step 6: Final answer
    x = 105,732.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.