Home / 97,721.16-134,670.89-78,318.02

Finding the Fourth Proportional to 97,721.16, 134,670.89 and 78,318.02

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Solution

The fourth proportional to 97,721.16, 134,670.89 and 78,318.02 is: 107,931.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,721.16 : 134,670.89 = 78,318.02 : x
  2. Step 2: Convert to fraction form
    97,721.16/134,670.89 = 78,318.02/x
  3. Step 3: Cross multiply
    97,721.16x = 134,670.89 × 78,318.02
  4. Step 4: Simplify right side
    97,721.16x = 10,547,156,391.49
  5. Step 5: Solve for x
    x = 10,547,156,391.49/97,721.16
  6. Step 6: Final answer
    x = 107,931.14

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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.