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Finding the Fourth Proportional to 118,437.80, 163,446.18 and 70,681.88

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Solution

The fourth proportional to 118,437.80, 163,446.18 and 70,681.88 is: 97,542.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,437.80 : 163,446.18 = 70,681.88 : x
  2. Step 2: Convert to fraction form
    118,437.80/163,446.18 = 70,681.88/x
  3. Step 3: Cross multiply
    118,437.80x = 163,446.18 × 70,681.88
  4. Step 4: Simplify right side
    118,437.80x = 11,552,683,281.22
  5. Step 5: Solve for x
    x = 11,552,683,281.22/118,437.80
  6. Step 6: Final answer
    x = 97,542.20

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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.