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Finding the Fourth Proportional to 290,310,574.80, 435,465,862.20 and 85,820,437.20

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Solution

The fourth proportional to 290,310,574.80, 435,465,862.20 and 85,820,437.20 is: 128,730,655.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,310,574.80 : 435,465,862.20 = 85,820,437.20 : x
  2. Step 2: Convert to fraction form
    290,310,574.80/435,465,862.20 = 85,820,437.20/x
  3. Step 3: Cross multiply
    290,310,574.80x = 435,465,862.20 × 85,820,437.20
  4. Step 4: Simplify right side
    290,310,574.80x = 37,371,870,679,678,952
  5. Step 5: Solve for x
    x = 37,371,870,679,678,952/290,310,574.80
  6. Step 6: Final answer
    x = 128,730,655.80

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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.