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Finding the Fourth Proportional to 141,891,686.40, 212,869,022.40 and 65,196,220.80

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Solution

The fourth proportional to 141,891,686.40, 212,869,022.40 and 65,196,220.80 is: 97,808,801.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,891,686.40 : 212,869,022.40 = 65,196,220.80 : x
  2. Step 2: Convert to fraction form
    141,891,686.40/212,869,022.40 = 65,196,220.80/x
  3. Step 3: Cross multiply
    141,891,686.40x = 212,869,022.40 × 65,196,220.80
  4. Step 4: Simplify right side
    141,891,686.40x = 13,878,255,785,870,546
  5. Step 5: Solve for x
    x = 13,878,255,785,870,546/141,891,686.40
  6. Step 6: Final answer
    x = 97,808,801.47

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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.